If you're on altminer, I recommend switching pools. Blocks there take 10 - 15 minutes to get scored, which means people can jump in with NiceHash and steal your rewards.



Anyone can hop in and get credit for the "new" blocks that have already been mined. You do the work, but they get the coins.

This is the other reasonably big Qbic pool: http://pool.mineproject.ru/site/mining  

They don't have this problem.