You are more knowledgeable than me. I've removed the settings and restarted the miner, after 18hrs using the settings I'm at 3.5% reject. Shall be interesting if I'm around 3.5% after 18hrs with the settings removed.

If not the server may not be compliant with the stratum protocol. Terk has stated it runs its own version of stratum, so I guess we will see (if the settings are required for his servers).

Proof will be in the pudding? I run sgminer 4.1 with the zuikkis kernel fwiw.