return valve leaks when unlocking on new Intex

Hi, Sorry, title is wrong. I meant to say when I move the intake valve to the unlock position, some water comes out underneath the cap that you turn to unlock. It seems to stop after the pump gets going. This is on the Intex ultraframe. Is this normal? The pool came with a sand filter, if that makes a difference.

Also, there are two tiny clear round caps that came with my pool that I don't know what they are for. They don't seem to be mentioned in any documentation.

Thanks!
 
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