Question About Engine Air Filter Change

[afinite]

Hi guys,

Just changed my engine air filter on my 08 is250 for the first time myself.

My only concern was that after replacing the filter I positioned the top part and put the clasps back on I noticed that the top cover is not flush with the bottom cover. What I mean is that there is a "lip" of sorts between the top and bottom covers. I stupidly did not check if this is how it normally is before I took it off so looking for input from you guys here.

Since this was the first time I have done this I was a bit concerned.

Thanks!