I'm taking a course and the instructor has beveled an edge and I cannot get the same result. My bevel only bevels on segment on one side then the rest, about 4 or 5 segments bevel on the other side. Other words the bevel is not beveling evenly on the top of a cylinder. Pictures below
The bevel appears distorted because the mesh has non-uniform scaling.
You probably scaled the object along a specific axis e.g. S > X. If you instruction had done this in edit mode, the scale doesn't change, but if one scales it in object mode, the scale will remain unapplied non-destructively. The visual appearance is the same. You can apply the scale in object mode, then return to edit mode and bevel.
- Leave edit mode and go into object mode ↹ Tab.
- Press ⎈ CtrlA and choose Scale.
- Go back into edit mode ↹ Tab, the bevel will work as expected.