Yeah, there was some weird and questionable stuff at the end of the game. If I were an LSU fan, I'd probably be feeling pretty robbed right about now.
I think there are reasonable explanations for how the Aggies tied it up on that final drive in regulation, but the worst one was that I absolutely believe LSU recovered a fumble to end the Aggies' possession in the first OT, and thus won the game at that point. To my eye it's not even questionable, it's a clear reception, fumble, and LSU recovery.
But the refs giveth, and the refs taketh away.