What you could try is loading the films so that the taped ends will butt together once you load them into the tanks.
Originally Posted by Laurent
Load the first film with the untaped end first and spiral it all the way to the centre of the spiral core, then load the second film with the taped end going in first so that the extra thickness will help avoid overlaps. Remember to open the red stops if using the Jobo reels.
The same method applies to Paterson reels too as they're designed for 120/220 or 35mm x 36 exp film.