Correct me if I'm wrong, but it looks to me like this mod should either be moved down in the install list (past the USP) or removed from STEP.
Reasoning:
When extracting the .bsa for the Unofficial Skyrim Patch and setting this mod to install prior to the USP (like suggested in the STEP guide), I don't believe this mod gets used due to the USP overriding the script. I haven't been able to test this theory, so I can't say with 100% certainty that this is the case. If my understanding of bsa's and loose files is correct, then this issue is only relevant if extracting the bsa for the USP.