Hm... Just went to make a test clip to send and this time it's working! How very strange. I wonder if maybe I accidentally changed a setting before which caused the problem. I guess I must have. Anyway, I'm relieved it's working now. I'll have to re-make a lot of clips, but it'll be worth it to have them the right size.
Thanks guys! I'm sure I'll have more questions soon.
Once again, I appreciate how helpful everyone is here. It's making it a lot easier for me to transition into being an independent VJ (as opposed to just jumping on someone else's computer while they take a break during a party). I'm having some crashing issues in Resolume now, but I suppose it'll be more appropriate to post about that in the other forum.