Am in the middle of a tournament game, and both of us have made a couple of moves this morning. But I just went back into the game, and our last two moves each have disappeared; the board is back to move 5 instead of the move 8 we were on. Never seen this happen before...has anyone else?

Hrm. Even more odd. If I go into my opponent's profile it shows it's his move in the game (for me it shows as my move). And if I hover over the board in his profile, it's on move 8 where it should be. Very strange.