I would do all the moves first. Then I would copy all the clips with moves on them to the above video track. Remove all the motion attributes of the new video track. Add the dissolves. Then for each clip I would copy the layer below. (clip with motion) then I would select the above clip with dissolve and paste the motion attributes back onto the clip. This should extend the motion through the dissolve. After your done you can delete the lower track.
James
http://www.rapidlightproductions.com