Whatever issue Gholly reported probably has to do with outdated pool code that doesn't support ASICboost (although, I always thought those T15 had Asicboost enabled by default so why did they work fine?). Some people would argue that certain miners might not be able to find shares large enough for a block and thus getting valid shares on the pool doesn't necessarily mean they can hit a block(they even block firmware that were not proven to find blocks), but then again, finding blocks on the testnet doesn't mean the miner is capable of hitting a block on the mainnet either.

TL;DR

Is your hashrate reporting fine on CKsolo pool? if so -- you are good to go, there is nothing more you can do.