I had the same problem with payouts. Take these steps:

Enter your wallet addresses for the coins you want to mine. Remember these are not BTC wallet addresses, but addresses of the perspective coins. Use Cryptopia and/or Bittrex. Disable all the coins you DO NOT want to mine.

Initially I tried to only mine LTC and got no payout. Now I don't even try LTC on this pool, I use a different pool for LTC. If there are no blocks, you get no payout of course.

Hope this helps