Did you purchase your tix before reaching plat?
Husband flew cathay a few weeks ago and BP read OW ruby instead of sapphire even though aa.com definitely had him listed as plat. Didn't really matter since he was in biz, but did think it was a bit odd. Just assumed it was because he hadn't reached plat until after the ticket was originally purchased.
Neither of us has flown any partner flights since then, so not sure if it's been corrected... perhaps it's an AA communication glitch?