When they came out with the OLED (and the special edition) instead of giving the regular shell, it was 2 shells. 1 thinner one that’s a bit thicker than the deck, and then the big one with a handle and the elastic covering a space to carry the charger. The small one actually velcros into the big case.
Oh, weird. I have the limited edition one, is that the difference maybe?
Check to see if your case seems extra big, and if the inner lining can be lifted and removed from the black case.