Did you ask for the CLI?
I've got a $1k limit B of A card, with a 20.xx APR, same deal, started secured, now unsecured. Its my oldest card - got it right out of college after some issues with other cards. Oops. I now have tons of credit with Citi and elsewhere, but I keep the BoA card around of AAoA. I've thought about doing a PC on the card, but B of A doesn't have any products that really excite me all that much. I keep thinking they'll raise the limit, but I've never asked.