I'll click on the summoning bell, look at my stuff and go "oh I guess nothing sold" sometimes for days after something sold. The gil they have for me doesn't update for days after selling stuff(according to sales history after actually grabbing the gil). Sometimes I'll see that something sold and excitedly click on my summoning bell and see that... there's no way to tell which retainer it sold on without going to each one individually and clicking on the gil part.