I'm having an issue with the DGB-Skein difficulty. It's show up, and so even though I specify username.workername_diff0.256 it's been ignoring my specifying the difficulty. I get some of them going up to Diff 5, which is ridiculous and I'm getting up to 35% rejected as a result.

I have GTX1060's so I need to set the difficulty lower so that I don't end up with stupidly high invalids like this. Previously it's worked fine and I've sat around 2-3%. What's going wrong with the server to make this now ignored / overridden?