Near the beginning of the movie when Mr. Tyler is talking with one of his crew, the guy with all the explosives (I forget his name) comes up from behind them. At this point Mr. Tyler is on the left. When the camera angle switches, Mr. Tyler is on the left again, normally he'd be on the right from this angle.
Okay, I want whoever wrote this to do something for me. Pop your copy of U-571 into your VCR (or DVD Player). Now go to the part you're talking about. Now, and this is the crucial part, WATCH CLOSELY. It's the CAMERA ANGLE that shifts, not Mr. Tyler. I watched that part right after I read your "slip up" and I noticed this first time. It's simply the camera that rotates, NOT MR. TYLER. Do me another favor, before you try to find a flaw in one of my favorite movies, watch it a couple of times and make sure you've explored every possible explanation.