Jeff,
I think I know what’s wrong. If you are applying keyframes to your stills to move them, and then apply a transition, you will see that the keyframes are no longer at the edge or beyond of your stills. You have to manually drag the keyframes back.
One thing I’d suggest is that you get PanZoomPro from lyric.com. Buttery smooth moves and no keyframes for transitions to mess with.
Have a wonderful day.