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.As for the 7-day average - it goes down as the difficulty goes up, due to more people crunching the numbers.