Oh, why thank you!
But I have sorted it out. Well, I didn't fix the problem but I came up with a way to add the last 1-2 second bits to each video clip; I re-recorded the last seconds of each video and edited those short clips to the videos on VideoPad, making sure everything aligned perfectly so that the viewer couldn't notice the edits. Sure, it required quite a bit of work and tweaking, making sure that each video clip's video and sound synced perfectly. But I'm happy with the results. Should have done this weeks ago, but I just now came up with that simple idea.
Thank you regardless! If something like this happens again I'll let you guys know!