Dan - there is a simple cure for films moving around in the tank - Use the 2509n reel in 2500 system tanks. You will never see a sheet in a different position then it was when you loaded not matter how fast you rotate, how fast your pour in and how much you pour in.
Though expert drums are undoubtedly superior, this might be a solution for this particular film.
I have the same experience. I use the Rollei 100 Tonal, a film on the same thin polyester base as the Infrared. I cut the 4x5 film to 6,5x9 sheets that I use in my Technika. When developed in the 2509 reel, it works fine.
Although I cut the film in my darkroom with a roller cutter, I have no problems with scratches.