I am not a fan of Red X. Same bag, much different results. It's like a self converting blend of Munich II, CaraMunich, and Special B. I had similar results and fed the bag dregs to the deer. IF I use it in the future, it will be treated much like a cara- malt. Like your experience, the mash pH seemed all over the place. One batch was low, the second just a bit high. I could also suck as a brewer... so there is that.
Certainly not German deer, they didn't bother, preferring the compost pile with souring pilsner malt.