its happen to me every freaking time
in several diffrent project im trying to use
the adjust track in order to fix my track.
im using to (or more keyframe)
and then i see that when i put the keyframe instead of calculating
the movment betwin one keyframe
what happen is that the surface
when he reach the othet keyframe
(like when you have two keyframe and one of them is a "HOLD" keyframe)
its happen to me again again and again.. in any project i open any idear what to do with it.