All the settings I'm using are basically the default settings. I really only know the basics thus far.

As for the footage and editing, I'm basically using clips that I have on my computer as well as YouTube downloader to get video clips. I've checked all the clips and each work perfectly fine. Sure, a few downloaded and only play at a few frames per second, but I was able to speed them up, and they aren't even the ones giving off problems.

The problem is that some clips, usually the same ones, seem to misplace where I wanted them. So if I cut a video to only play at maybe 20 seconds in to 25 seconds in with the rest of the clip sliced off and deleted, when encoding, it would instead go to 0 seconds in to 5 seconds in, or maybe 40 seconds in to 45 seconds in. And the weirder part is that when I entered the encoding process, the entire video clip was fine and perfect, but when the encoding goes wrong, it actually alters the sequence itself to whatever the encoding messed up, and it alters the save file as well. I've resorted to basically holding the original on a flash drive in order to make sure I have a pure copy.

The only effects I've used so far are just basic ones, such as fades on audio and video, and volume. The only other thing aside from those that I've done in the effects tab is that I made the video larger to fit the whole screen in all of the clips.

The Export settings are the basic, default ones. I haven't messed with the exporting window at all.

As for the screen capture:

I pretty much have only 4 active tracks, with one of those being for hidden video or audio. This is the sequence I'm trying to export, however some of the first clips or some of the ones in the middle are the problem areas. And they don't always encode incorrectly. Sometimes they work fine. But sometimes when other clips mess up and I fix them, when I go back to test the encoding, the clips that were fine a minute ago mess up again.