Ok, I found the hard coding in global.php (well actually my friend did) and we tried messing around with that... to no avail.
I also realized it was asking for the template set id # (not the style set id #) in the admin cp, but even when we input the correct one in there we had no luck.
We tried creating an exact copy of the other style set and using that info on both the global.php settings and the settings in the admin cp with no luck.
Deleted that style and now we're back to square one. We don't know where it's pulling this old template set from, and we can't get it to use the correct one.
I have a headache.