have the same problem
trying to book SMF-CNF for December/January.
ALL options on the first two pages of price/schedule will come back as not available any longer. What a joke.
Tried to book on kayak.com. They show the price, but then just link to AA.com where the same problem continues. I guess AA advertises the low prices to come up high in the search on sites like kayak.com. Of course they only angry any possible customer when the advertised fare is not available.