ivsEdits

Hello, this is my first try with ivEdits LE. I've been playing with the middle of a video clip obtained by either trimming from the trim window or moving the markers. Whenever I preview, a frame that comes after the clip I'm using shows for a second or so. When I try to locate it going frame by frame, it is absent. It logically belongs to a part that's been trimmed away; but for some reason that part only shows up during preview at normal speed and, unfortunately, on export. The only workaround I can see is to do the trimming with Windows Movie Maker and then import the output into ivEdits.

Originally, the clip I'm importing is an mp4 that ivEdits won't import; and I converted it with Handbreaker, using 3 different formats; but I'm getting the same behaviour with all these formats.