some times when i start a new round with another, usually 2nd round, i'd make my first move, then my opponent moves, when it's my turn, somehow the piece that i had moved the turn before had gone back to its original spot, i suddenly couldn't move any other piece (when i tried to move another piece, server would tell me 'bad move, not my turn') nor could i unsit to avoid scores being lost as time goes by, and i'd lose the round for no reason. that's so unfair, did this happened to anyone else before? please reply. thanks!

Ok, this mistake usually happen when player play 2nd game, because one of two players press new game button too much! and your connecttion has fault. Please wait more before you begin play 2nd game and you won't see this problem again.
good luck and fun

okie, thank you for that skeleton =)