Hi, liz, welcome to the forums! You have just discovered the difference between FICO and FAKO. The scores that you buy here are FICO scores. (You can also buy your EQ FICO from Equifax, and your TU FICO from transunioncs.com, notice that "cs" at the end.) But what you got from TransUnion was a FAKO. It's on a completely different scale, no one knows what the formula is that creates it, and no lenders use it. But it's a pretty sweet way for someone to make money off of consumers.
There are lots of other types of FAKO's out there. Please read Credit Scoring 101, stickied at the top of several of the forums here.
In the meantime, I'm moving your post to Understanding FICO Scoring.
* Credit is a wonderful servant, but a terrible master. * Who's the boss --you or your credit?
FICO's: EQ 781 - TU 793 - EX 779 (from PSECU) - Done credit hunting; having fun with credit gardening. - EQ 590 on 5/14/2007