Turn signals do not cancel automatically.

I'm not aware of how the 95 wheel goes on.
Is it splined?
Your description makes it sound like you pulled the wheel, put it back on in a different spot to straighten it.
Where's in most situations I would believe that type of adjustment needs to be made at the rack and shaft.

I've also had on another ford vehicle a little knub break off the arm. Couldn't tell what the issue what until I had a second one in hand.

Regardless, I would think you could remove the stalk and manually trigger the cancel.

I doubt you could over tighten it. The movement is probably in the shaft, not the wheel.

95 Mustang has 2 flats on the shaft, the wheel will only go on one of two ways. I think what he meant by straightening the wheel, is after a turn.