I think they might be typos on the little signs - the SDCC presentation which is just a PPT file and can easily be changed, has the B-Wing on shelf 10/1 and the A-Wing on shelf 11/1.
So which is it? I guess tonight we'll find out for sure. If the B-Wing is there then we know the PPT is wrong and the little signs are right, if not, then I guess the PPT is.