live chess

sometimes when i am playing in quick games and start using premoves I lose the ability to move any of my pieces.  this is very different from not being allowed to move because it is an illegal move.  the piece stays where it is as i try to drag it, instead of the piece moving some translucent image of the piece moves.  when i try to let go of this transulecent image of the piece to set it down the transulecent image simply dissapears and nothing changes in the game.  this makes me lose on time in any game that this happens in; i have lost a rated games like this but im not worried about that.  right now i would just like to know what the problem is and if you guys can fix it.  this may help too, it seems that the number of premoves i use isnt important.  sometimes i use several with no problem.  i think that the issue has something to do with me moving my piece at the same time as my opponent.  

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I am curious about too.

i dont when im dragginga piecenormallyand itstops to a bad square.