Correction;  its #xnsub; maybe you posted a typo

The exchange is long for many reasons:  Either a buyer is needed and not present, the coins haven't matured enough yet (blockchain/wallet stalled? network problems? grossly large amount of confirms needed before it can sell?), etc... there are many reasons why it would take time to get your earnings fully exchanged.   Remember, its working on the principal of others buying.... which there isn't always others buying them all the time.

To maintain proper protocols, the password should be:
c=BTC,sha256

the stratum address needs to have stratum+tcp://sha256.mine.zpool.ca:3333#xnsub to enable it in the S9 from what I recall.

As far as difficulty being set manually;  from memory (i suggest reading back on this thread and the original one to figure out for sure) the diff should be ~16,000