I am also quite unlucky. I've found 8 blocks for the pool, but my balance is just 328. I've also noticed my 7-day average go down quite a bit since Feburary 8th for reasons I cannot understand.
Unlucky?

Surely this means you
are rather lucky - you have found more blocks than the average person would. But the pool averages it out.
Erm, I don't understand your point here. Hacim is saying that he's found 8 blocks, which without the pool would have gained him 400 BTC, while because he did it for the pool he only has 328 BTC to show for it, which is a net loss. The "more blocks than the average person would" is based on hashrate, which Hacim did not mention.