How many times can a collection agency report the same collection to one credit reporting agency?

I just went through a bankruptcy in Pennsylvania. as far as i know (and I'm no lawyer) is only once. i signed up for one of these credit verification services through one of my credit cards they send you a copy of your credit report every quarter of a year and get all of those extra reports and stuff, that may not even be yours off your credit report. i hope i was of some help