u/Disastrous-Basis-782

Hey all, I have a 08 350 with a stillen supercharger kit recently purchased from fb marketplace. Was getting a P0305 cyl 5 misfire code. Went to change the plugs and saw the well for cylinder 5 had some oil in it. Now I’m learning that you have to change the entire valve cover to fix that. My question is, is the gap between the top of the well and the cover supposed to be that large? Or is that a sign that I’m going to start getting oil in all my plugs? I’m probably explaining this terribly but I would expect there not to be an air gap between the metal wall of spark plug well and the cover.