Yes this is the issue- actually, i think it is a problem with the design of the case and not your product so much.
yes - the sniper 2 bay device does not fit in this case because the case contains plastic strips that make the bay slot more narrow. this fits dvd drives very well, but does not fit with your sniper 2 bay device, and probably some other devices as well.
overall it seems the problem is with this case, not your sniper 2.
many thanks
Tim