its a known SGminer bug, and happens to most new algos on sgminer till someone makes an optimized/fixed version
in fact i think one of the new ones that bug is fixed, check "brians" Sgminer
Glad I read your post, I was tempted to run off and figure out how to solo this coin for a while. I figure one of these times testing out my luck has to work,
I've had shares show up in the 200+ range; made me consider a week or 2 of solo activity. Tough for me to figure out if they are legit as my pool hits a ton of blocks in a day and I had to restart everything to make some adjustments.