The tetenal kit gives 31c times, I used those rather than the 38/39c times, I didnt get any colour casts, certainly nothing like yours even if I drifted off a degree or 2, which would happen time to time.

From my experience the tetenal kit is quite robust, if its not the film, then something has to have gone really wrong on your end other than being off by a little bit.

My suggestion is you've mixed the part A, B, C of the developer up in the wrong ratios, or you've added them out of order (they do funky stuff and gets precipitate when you do that), add them to the required amount of water rather than mixing the concentrates together then to water.

I mixed mine up as I needed it, rather than all at once as well.