They fitted in mine perfectly, you must've not fitted them locked in properly if they are properly locked in place they canot move , talk to that Bi led guy first if he can guarantee that they will fit properly and refund policy in case they don't etc etc.
Make sure you line up the three tabs on the bulb base and the foglight base perfectly and then rotate to lock them in place after that they cannot move , unless your foglights plastic base is damaged in that case no bulb will fit properly.