Well I just developed an unexposed roll, same thing. . . .
Edited to add . .
I just figured it out. When I took the film off the spool, it was the inner windings that were over exposed . . then it hit me, I forgot to put the center piece in the tank . . . 4 times!
D'Oh!
That's what I get for taking 10 months off of processing . . . won't make THAT mistake again. What a dope.
Thanks everyone for your community head scratching LOL!
Edited to add, again: And someone above actually ~asked~ me if I remembered to put the center piece in the tank . . . I'm only 64 . . . too soon for senility!!! Oh Lordy . . . I'm having a good time laughing at myself . . :/