Sorry to bring this thread back from the dead, but I had a question about the spells/day. If the dragon disciple progresses sorcerer spells levels what happens when you take sorcerer levels after that. Do you just keep progressing the same way? For instance, a Sor 5/DD 4 would cast spells as an 8th level sorcerer, but then he takes another level of sorcerer, does it just progress spells/day, and spells known as if he's a 9th level sorcerer?
If so, what happens if he progresses beyond a 20 CL? Say Sor 11/DD 10?