I doubt you'll be getting that much. I'm on the same pool, made ~1 CHN in half an hour with 300Kh/s. chn.dontmine.me is sucking up most of the blocks, because of those faggots vampirevn and phamquangcuong same ones that jumped on FTC a while back.
Read the about to understand PPLNS.. You have to stay in the pool more than that to get the correct payout. PPLNS discourages pool hopping,