Acording to the Kodak publication you should use 250ml for each square foot of film. Thus each roll of film (aprox. 80 sq inches) needs about 140ml. Your 6 rolls should have had 833ml of solution. This is most likely your problem, though I haven't yet used the Kodak kit. I have used the Tetenal Kits in a Jobo and have had very good results, so if your times and temps were correct, it is most likely your solution volume.