Ok how would i figure out if im using postbit and postbit_legacy

Well, you can always do this - - vboptions > General Settings > Add Template Name in HTML Comments > set to Yes . Then go back to your page and view the source code and you will see the name of the template called around your part of the code. But in general (unless the style designer did something strange), if the userinfo is on the left, you are using the postbit_legacy. If the userinfo is on the top, it is the postbit template.

If your user info is on the left hand side, chances are you're using postbit_legacy, as the default (postbit) one is set up with the user info on top like here on vb.org.

Also check out vBulletin Options -> Style & Language Settings -> Use Legacy (Vertical) Postbit Template. If that's set to yes, then you're using postbit_legacy.