While the consensus view to chuck the Paterson reels may be the best option, here's a "tip" to try in the meantime.
I make a guide by cutting a small rectangle out of the thin cardboard (the film box is ideal) the width of the reel and place it just under the plastic tabs where you start to feed the film.
I always remove the paper backing and spindle and roll the film into my hand before I load the reel.
The homemade guide makes it easy to get things going smoothly to start.
By keeping the reel above the rolled-up film in my hands (like rolling toilet paper back up the roll) and my thumbs helping along the edge the film doesn't slip out above the plastic guide tabs and ball-bearings.
When done, I discard the cardboard guide and seal up the tank with a sigh of relief and a smile.