So I was editing a replay in Toribash, it looked perfectly fine I edited and then previewed it the first time, but then I went to look at the replay again a while later, and the tori starts bugging out, like the tori just pops to different directions in an instant.

Like the 15th person to ask about it... Replay editting is glitched up in Toribash 4.31. If you want to make replays, use earlier toribash versions.