Did you download the game shortly after(like on the very day of) it's release? There was a debug code I accidentally left in, so the first 2-3 downloaders of the game have a glitch that makes the powerups always be the size powerup. Sorry about that, but if both of you download the latest version you should not have desync issues. Sorry for inconvenience.
hmm, i don't think i've downloaded it shortly after the release, and i didn't see any powerup glitch. it just desyncs. with more detail: (not so much because my english isn't good, sorry.) until we start the match, everything is fine. when we do a point, the game desyncs. or a little before that. example: i scored a point, but for my friend he scored it, and the ball desyncs.