I use Hewes SS reels but not for the Jobo tanks. With my reels, end of film does NOT touch the layer below it. Are your reels in good condition? Has it been dropped at all?
I recall, with cheaper reels I used to have, it did happen because the distance between two sides weren't even and when I let go of the film after winding it in, it'll snap back a bit and jumps the track.
If end of the film is touching the layer below it, by itself, it isn't a problem. BUT, as you agitate/rotate the drum, more of it may come unwound and that may be a problem. THAT did happen to me few times with cheaper reels. That's why I only use Hewes now.