I've had my retainer in the first market ward in Ul'dah for weeks, and dismissed her last night, thinking I'd take her to Limsa Lominsa for awhile. However, I didn't end up going, and decided to re-summon her today in the first market ward in Ul'dah yet again.
Now it's saying that "You cannot summon any more retainers in this area.", but she's not even there! I went to a bell to summon her at the Adventurer's Guild, and that worked fine, but I still can't re-summon her in the market ward!
Is there some kind of cool down from dismissing and re-summoning in market wards that I'm not aware of, or is this just yet another glitch in which I'll have to wait for the next emergency maintenance to correct?