So sorry, I missed this first time through.
I went on as AU on my daughter's BofA card last summer, and it was immediate. The card reported, complete with CL and balance, the next day on EX and within the week for EQ and TU. When I came off of it (she had been out of the country), it took until the next statement dropped for it to come off my reports.
Either they have something wrong, so that the info doesn't transmit to your reports, or BofA has stopped reporting AU's. I would call and investigate. The first CSR you get probably won't know the answer, so just politely keep going until you find someone who can check your file and see what the hang-up is.
* Credit is a wonderful servant, but a terrible master. * Who's the boss --you or your credit?
FICO's: EQ 781 - TU 793 - EX 779 (from PSECU) - Done credit hunting; having fun with credit gardening. - EQ 590 on 5/14/2007