Sand filter allowing bugs to enter pool

[nicole12]

I took the top off the filter today to see if I had the spider gasket lined up right with the holes. Not sure what I'm looking for. Right now my "filter" is at 12 o'clock and the valve opening on the spider gasket is on 12 o'clock, is that correct? Here is a picture of my gasket and inside my filter. Can someone explain how it should be. Looking at the picture of the inside of my filter the biggest whole (1/2 of the pie) is the filter setting. Recirculation is 10 o'clock. Should the biggest opening of the spider gasket line up with the biggest opening on the filter? If so I do have it backwards. I have the biggest opening set on the recirculation side of the filter and that small opening on the "Filter" setting. My other functions backwash and waste work at they should with the way I have it set up now.

You can also see the spider gasket on the table is one that I ordered, it lines up perfectly with the filter but not with my valve assembly. So I have a new one on order. I hope the fact that the valve assembly doesn't match with the filter isn't a problem in itself. That's how it came, I bought the filter/pump as a package.