I recently installed a Hayward skimmer on my Intex pool. It works great while the pump is on, but when it's off, the weir door does not float. It just stays at the bottom. And even if it did float, there does not seem to be anything to stop it from opening into the pool. Seems stupid to me. I thought that the weir was supposed float up when the pump is off and stay shut to keep debris from floating back into the pool. The instructions make no mention of any sort of stopper. There are no tabs or stoppers or anything whatsoever on on either the weir or the skimmer itself to keep the weir from opening into the pool. And even if there were, the weir doesn't even float in the first place. The weir simply snaps into two holes on either side and swings both ways. It just seems very poorly designed. Am I missing something really obvious or is this how all skimmers are? The skimmer I have is the Hayward SP1091LX Dyna-Skim.