Yeah that happens with square and circle (slice, topsin serves) flat serves are ok. At first I thought ir was my ps3 but it happens a lot. So try not to use buttons for serve only x. Or hust use the stick for spins
Yeah that's happened to me too a few times. I couldn't tell if it had to do with the connection or the game. Oddly enough it was something where it only happened when the other guy hosted but when I did we were fine. Odd.