Thanks for the replies! Got it figured out, was actually simpler than I expected.
Struggling with a new dissolve transitions problem, though. On some of my slides, as it cross dissolves there is a flicker. When playing the movie through, it looks like it's playing the first picture, dissolves to the second picture, then plays the first for a split second before continuing on with the second one again. When I look on the precision editor, my transition has 4 frames. In the transitions that look good, there is no change in the first frame, but frames 2 - 4 become progressively more like the second picture. In the transitions that look poor, frame 1 in the transition looks identical to frame 4 (where the second picture is more prominent). Oddly, I tried deleting and the reading the transition. Not only did this shift all later parts of my project one transition length earlier (4 frames earlier), but the "flicker" problem occurred in a different way. Instead of messing up by showing frames: 4, 2, 3, 4, it showed frames 2, 3, 4, 2. Sigh.
Yeah, that was complicated, so briefly:
Correct transitions: frames 1, 2, 3, 4
"flicker" transitions: frames 4, 2, 3, 4
Delete "flicker" transitions and put in new transitions: frames 2, 3, 4, 2 and project shifted one transition length earlier.
Any ideas on how to fix this?