Always a good idea to not let your wrists roll back. Consider getting wrist wraps and wrapping them around. You may still have the tilting issue, though. It's fairly common. The lagging arm could be the weaker arm or it could be the stronger arm allowing the weaker arm to get ahead. Either way, if you don't have a coach real-time, film all your sets to try and make adjustments that even it out. When you are successful, try and remember what that felt like and keep practicing it.