This is just the nature of the beast with this type gun, and you just learn to deal with it.
Must be other demons at work here, since myself and others on this thread have had no such problems when regularly carrying the 1911 pistol.
Question: If the gun doesn't move in your holster, how is it going to get off safe? It is possible to off safe the gun during holstering. I put my thumb under the safety when holstering. Just enough upward pressure to know it stays on.