I can only sympathise. I have never heard of an inversion system requiring less time nor of plastic tanks giving contamination. Given how much Jobo tanks are used for colour work there may be a lawsuit from Jobo on its way as we speak
Unless Tetenal address these issues which might simply be careless translation or lazy text composition then assuming there are alternatives to Tetenal E6 chems it might find its sales dropping off
In the U.K. there are several retailers who are switched on such as Ag Photographic, Silverprint, Process Supplies, Firstcall and RKPhotographic. Raise it with one of them which supplies the kit.