If your film is fresh, and you have the back properly attached to your camera, it can only be a processing issue, due to "something" not working right with your back. You do not need to pull the film out very slow, a pull of one second (one thousand and one) spoken, is quite satisfactory.
Some people have had issues with correct loading of filmpack into filmpack holders. You just lay pack in, you do not thread the black tab under or over anything, you just make sue it is hanging out of holder when you close back.