i think this is a glitch or something. i bought the Blender Game Asset Creation for my left over money on steam so i cant really get help there so i ask here instead. i am stuck on the Blender: 5.2 UVs - Mirror Modifier video and this always seems to happen when i mirror the traffic cone.
Before adding the modifier:
After adding the modifier:

someone pls help i am a pretty noob in blender and i understand that this might be very easy.