I don't know if this is an AA site maintenance "feature" or not, but I just made a reservation on AA.com(I am an AA ExPlat) and, while seats are available in the exit row(s)...I was not able to view or select an exit row seat.
I Called the "KnowME" line and they were able to change my seats to the exit rows. I then asked to speak to AA.com where they acknowledged and verified my inability to view/select the exit row seats. The "techie" then said that I was not the only ExPlat to report this.
They did ask my computer (HP), Operating System (XP), Browser (Google Chrome but I normally use Firefox).
Hope no one else experiences this as well because I do like to plan my trips by getting the seating "profile" of the cabin and selecting my specific seat accordingly.
Cheers....