It's definately the recordings and not your set up. I hear the same thing. On some recordings drums span the whole sound stage. So if your speakers are 8 feet apart you'll be listening to an 8-10 foot drum set. With piano's the same, you'll hear a good sound stage for some notes then all of a sudden a note will shoot out of nowhere far away from the rest of the notes. In that case, like Tarsando mentioned it is best just to focus on the music, otherwise you'll just be confused.
Best Regards,
Rob
Best Regards,
Rob