Eliminating "jump" when adding dissolve

I have two photos side by side in the timeline, apron 6 seconds each. Each photo has some motion (scale and position) beginning at the first frame each photo, and ending at the final frame of each. I've added a cross dissolve to transition between the two photos, and rendered the timeline. When played in the viewer, there is a noticeable "jump" at the transition. If I remove the cross dissolve, the "jump" is not apparent, just a straight cut from one to the next. How do I add the dissolve so that there is no "jump'"?