Overtiming in a revolver?

[Darkgael]

This is a new term for me. Read it on Gunbroker. A revolver cylinder occasionally "overtimes". What is that? Does it mean that the cylinder occasionally turns too far?
What could cause that to happen?
Remedy?
Pete

 

[Darkgael]

Found most of what I need in the thread below about revolver timing.
Sorry for the repetition.
Pete