Thanks for your observations Sandy. Overagitation was my first thought. The Jobo is a slow as it will go (by dial setting anyhow - it's jammed against the switch detent).
(aside - does anybody know any "electronics" tricks to alter the motor speed controller to get a slower rate, without stalling the motor???)
I will be resorting to my old SS reels and invertible tanks for the rest of my 35mm testing. (was getting lazy and thought I'd try the Jobo for 35...guess I know better now.)