Well, simply put, something seems to be wrong with my "Wait Until Move's Completion." If I ever use it, RMXP treats it like a "Wait Until the first move in a set move route is completed then cancel it and continue on." It happens in all occasions when I use it. No, I'm not using Parallel process, it's autorun, it just doesn't work Does anyone know what could be wrong with it? I'm using windows 7 if that means anything (which it probably doesnt)

Is your event/character who is moving running into an event on your map or a wall/etc...? Events can't pass through other events unless through option is on. (Even if it has no graphic)
Maybe you have two move routes and then one wait for move under it.
You said you use autorun...does it work without autorun/parallel, like having a move route in just a regular event when you interact with it/talk to it.

If none of that works, or it's not the problem, try starting a new project and test if the move completion is messed up. It might just be that one project you have open.
I don't use Windows 7, so I'm not sure if that is a problem. Like you said, it shouldn't be a problem.

The event was on the ground, and only following one move route. I haven't tested the last one, but upon opening another project I found the problem seemed to be restricted to the one only. Since I was planning a restart anyways, that's probably what I'll do. Hopefully it won't happen again! Thanks for the help though!

Starting a new project, then copying all files from the data folder of your old project to the new project may solve it so you don't have to start over. If not, then good luck with your new project and hopefully it doesn't mess up again.