Did you check it a second time after what I told you to check? I think that maybe the filter isn't set right if the box is on correctly. It should fit snuggley on the sides but not tight.
Were there any tools you might have used? If so check for them and see if one may be missing.
I don't really know about the high sound. Mine had a low roary sound until I had fixed the box and set it right.
About the part falling, is there anything in the glove box that might have moved causing the same sound?
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