From what I've been able to find, there's no record of the spell acquisition trophies being glitched in Dark Souls. It may be a stupid comment, but are you absolutely sure that you have all the sorceries? You've probably double- and triple-checked, but just in case.
My only other thought is that by using the BB glitch, you've glitched the trophy. Googling the glitch doesn't turn anything up but I can see it being possible. Did you use the glitch to acquire any of your sorceries? If so, try re-acquiring those that you used the glitch to get. Apart from that, I have no idea; it may be necessary to just bite the bullet and play through again with another character.