Did a Factory Data Reset & now my Market is an older version?

You have a Thunderbolt, right? I highly doubt that is the issue if you do. You should still be able to use some form of the Play Store on it forever I would think.
 
Nope, the very first Optimus. It doesn't even exist. Haha. I'm not entirely sure how, but I went to an app called 'my device' and it transferred me to a page asking me to accept my play store. Don't quite understand it.. But all seems to be working like it was before, although the reset made my phone glitch more. Oi.