I've been having this problem when editing video in WMM for a very long time now, and it's driving me absolutely crazy. When I trim a segment, whether via the trim tool, "set end point", or "split" (and then delete the excess), it never, ever cuts where it says it does. It finds the next visually differentiable frame, the one I'm trying to cut out, and inserts that in. This happens even when I cut 3-4 frames before the scene switches. How do I get rid of these things, short of exporting, converting to a gif, and editing in frame by frame?