Hello joeflyer59, and welcome on this board.
The purpose of this rubber around the AudioFuse is to be a part of the package for protection, and is meant to be removed by user on first opening, just like a plastic protection of a brand new cellular phone's screen.
it can also be replaced if you want, but it is a bit tricky.
Anyway, when rubber is removed, you'll notice that the cover suits the unit perfectly.
For sure we should communicate more about it, sorry for the confusion,
i'll share the info with support team,
hope it helped!
best,