diff --git a/src/components/planner/sidebar/CoursesController/ClassItem.tsx b/src/components/planner/sidebar/CoursesController/ClassItem.tsx
index 13769b51..b8bc0332 100644
--- a/src/components/planner/sidebar/CoursesController/ClassItem.tsx
+++ b/src/components/planner/sidebar/CoursesController/ClassItem.tsx
@@ -1,8 +1,8 @@
-import { useContext, useMemo } from 'react'
+import { useContext } from 'react'
 import { ClassInfo } from '../../../../@types/index'
 import { DropdownMenuCheckboxItem } from '../../../ui/dropdown-menu'
 import { ExclamationTriangleIcon } from '@heroicons/react/20/solid'
-import { conflictsSeverity, schedulesConflict } from '../../../../utils'
+import { classesConflictSeverity } from '../../../../utils'
 import MultipleOptionsContext from '../../../../contexts/MultipleOptionsContext'
 import CourseContext from '../../../../contexts/CourseContext'
 
@@ -10,7 +10,6 @@ import CourseContext from '../../../../contexts/CourseContext'
 type Props = {
   course_id: number,
   classInfo: ClassInfo
-  conflict?: boolean
   onSelect?: () => void
   onMouseEnter?: () => void
   onMouseLeave?: () => void
@@ -29,26 +28,26 @@ const ClassItem = ({ course_id, classInfo, onSelect, onMouseEnter, onMouseLeave
     onSelect();
   }
 
-  const conflict: number = useMemo(() => {
-    const classes: ClassInfo[] = []
+  const conflictSeverity = () => {
+    const chosenCourses = multipleOptions[selectedOption].course_options.filter(
+      (option) => option.course_id !== course_id
+    );
 
-    for (const course_option of multipleOptions[selectedOption].course_options) {
-      if (course_option.picked_class_id && course_option.course_id !== course_id) {
-        const pickedCourse = pickedCourses.find(co => co.id === course_option.course_id);
-        // retrieve class with the picked class id of the course option
-        const pickedClass = pickedCourse.classes.find(c => c.id === course_option.picked_class_id);
+    const otherClasses = [];
+    chosenCourses.forEach((option) => {
+      const courseInfo = pickedCourses.find((course) => course.id === option.course_id);
+      const pickedClass = courseInfo.classes.find((classInfo) => classInfo.id === option.picked_class_id);
 
-        classes.push(pickedClass);
-      }
+      if (pickedClass) otherClasses.push(pickedClass);
+    });
+
+    let maxSeverity = 0;
+    for (const otherClass of otherClasses) {
+      maxSeverity = Math.max(maxSeverity, classesConflictSeverity(classInfo, otherClass));
     }
 
-    for (const pickedClass of classes)
-      for (const slot1 of pickedClass.slots)
-        for (const slot2 of classInfo.slots)
-          if (schedulesConflict(slot1, slot2)) {
-            return conflictsSeverity(slot1, slot2);
-          }
-  }, []);
+    return maxSeverity;
+  }
 
   return (
     <DropdownMenuCheckboxItem
@@ -62,8 +61,6 @@ const ClassItem = ({ course_id, classInfo, onSelect, onMouseEnter, onMouseLeave
           {classInfo.slots.map((slot, idx) => (
             <div key={`${classInfo.name}-${idx}`} className="flex items-center space-x-2">
               <span className="text-xs text-gray-500">{slot.lesson_type}</span>
-              {/* <span className="text-xs text-gray-500">{convertWeekday(slot.day)}</span> */}
-              {/* <span className="text-xs text-gray-500">{getLessonBoxTime(slot)}</span> */}
               <span className="text-xs text-gray-500">{slot.location}</span>
               <span className="text-xs text-gray-500">
                 {slot.professors.map((professor) => professor.acronym).join(', ')}
@@ -72,7 +69,7 @@ const ClassItem = ({ course_id, classInfo, onSelect, onMouseEnter, onMouseLeave
           ))}
         </div>
       </div>
-      <ExclamationTriangleIcon className={`h-5 w-5 ${conflict ? 'block' : 'hidden'} ${conflict == 2 ? 'text-red-600' : 'text-amber-500'}`} aria-hidden="true" />
+      <ExclamationTriangleIcon className={`h-5 w-5 ${conflictSeverity() > 0 ? 'block' : 'hidden'} ${conflictSeverity() == 2 ? 'text-red-600' : 'text-amber-500'}`} aria-hidden="true" />
     </DropdownMenuCheckboxItem>
   )
 }
diff --git a/src/components/planner/sidebar/CoursesController/ClassSelectorDropdownController.tsx b/src/components/planner/sidebar/CoursesController/ClassSelectorDropdownController.tsx
index a5d42203..bf064d62 100644
--- a/src/components/planner/sidebar/CoursesController/ClassSelectorDropdownController.tsx
+++ b/src/components/planner/sidebar/CoursesController/ClassSelectorDropdownController.tsx
@@ -4,7 +4,7 @@ import { ClassInfo, CourseInfo, CourseOption, ProfessorInfo } from "../../../../
 import StorageAPI from "../../../../api/storage";
 import CourseContext from "../../../../contexts/CourseContext";
 import MultipleOptionsContext from "../../../../contexts/MultipleOptionsContext";
-import { getAllPickedSlots, schedulesConflict, teacherIdsFromCourseInfo, uniqueTeachersFromCourseInfo } from "../../../../utils";
+import { teacherIdsFromCourseInfo, uniqueTeachersFromCourseInfo } from "../../../../utils";
 import { Desert } from "../../../svgs";
 import { DropdownMenuGroup, DropdownMenuItem, DropdownMenuPortal, DropdownMenuSeparator, DropdownMenuSub, DropdownMenuSubContent, DropdownMenuSubTrigger } from "../../../ui/dropdown-menu";
 import { Tabs, TabsContent, TabsList, TabsTrigger } from "../../../ui/tabs";
@@ -157,13 +157,6 @@ const ClassSelectorDropdownController = ({
     setMultipleOptions(newMultipleOptions)
   }
 
-  // Checks if any of the selected classes have time conflicts with the classInfo
-  // This is used to display a warning icon in each class of the dropdown in case of conflicts
-  const timesCollideWithSelected = (classInfo: ClassInfo) => {
-    const pickedSlots = getAllPickedSlots(pickedCourses, multipleOptions[selectedOption])
-    return pickedSlots.some((slot) => classInfo.slots.some((currentSlot) => schedulesConflict(slot, currentSlot)))
-  }
-
   return <>
     <div>
       {course.classes === null ? (
@@ -226,7 +219,6 @@ const ClassSelectorDropdownController = ({
                         key={`schedule-${classInfo.name}`}
                         course_id={course.id}
                         classInfo={classInfo}
-                        conflict={timesCollideWithSelected(classInfo)}
                         onSelect={() => {
                           setSelectedClassId(classInfo.id)
                           setPreview(null)
@@ -260,7 +252,6 @@ const ClassSelectorDropdownController = ({
                             key={`schedule-${classInfo.name}`}
                             course_id={course.id}
                             classInfo={classInfo}
-                            conflict={timesCollideWithSelected(classInfo)}
                             onSelect={() => {
                               setSelectedClassId(classInfo.id)
                               setPreview(null)
diff --git a/src/utils/index.ts b/src/utils/index.ts
index 9a26ab6f..af71ab82 100644
--- a/src/utils/index.ts
+++ b/src/utils/index.ts
@@ -1,6 +1,6 @@
 import config from '../config/prod.json'
 import dev_config from '../config/local.json'
-import { CourseInfo, CourseOption, SlotInfo, MultipleOptions, Option, PickedCourses, ProfessorInfo } from '../@types'
+import { CourseInfo, CourseOption, SlotInfo, MultipleOptions, Option, PickedCourses, ProfessorInfo, ClassInfo } from '../@types'
 import { type ClassValue, clsx } from 'clsx'
 import { twMerge } from 'tailwind-merge'
 import Plausible from 'plausible-tracker'
@@ -77,6 +77,20 @@ const conflictsSeverity = (first: SlotInfo, second: SlotInfo): number => {
   return (isMandatory(first) && isMandatory(second)) ? 2 : 1;
 }
 
+const classesConflictSeverity = (first: ClassInfo, second: ClassInfo): number => {
+  let maxSeverity = 0;
+
+  for (const slot of first.slots) {
+    for (const otherSlot of second.slots) {
+      if (schedulesConflict(slot, otherSlot)) {
+        maxSeverity = Math.max(maxSeverity, conflictsSeverity(slot, otherSlot));
+      }
+    }
+  }
+
+  return maxSeverity;
+}
+
 const schedulesConflict = (first: SlotInfo, second: SlotInfo) => {
   if (first.day !== second.day) return false
 
@@ -395,5 +409,6 @@ export {
   uniqueTeachersFromCourseInfo,
   teacherIdsFromCourseInfo,
   scrollToTop,
+  classesConflictSeverity,
   plausible
 }