Lid
Do you know this for sure??? I didnt think so.
All lids for the most part have fitment issues. Just try and wiggle it around, make sure the back tabs are all the way in the slots, as well as making sure the lid is slid back into to place over the filter. It takes some messin with. If the lid is sitting to far forward, this will cause the clamps to flip open. If need be you could trim your bellow to allow the lid to sit properly, if that is your bellow is to long.
Just my .02



