Question about the Bioshock Platinum Hits Edition

I recently bought the Platinum Hits edition of Bioshock for 360. Every now and then, when I play a new audio tape, it will also start to play an audio tape that I already picked up in the game awhile back. Is this a common glitch with the platinum hits version or is there a chance I bought an illegal copy?

So you are hearing two audio diaries every time you try to play a new one? I have the platinum hits and this has never happened to me. Are you playing the new clip by holding "A", or are you playing it from the menu? If it's the menu, try just holding "A" to listen mid-game.

Well it's not every time. It's only happened a few times, but it just seemed strange because it never happened when I owned the original version. It happens when I pick up a new audio diary and hold A.

I bought it off eBay from some guy in Puerto Rico so I just want to make sure I didn't buy some illegitimate copy.