We've all done it (some of us more than once). You replace a character in formation and all your sacreds pop off, but you can't replace them on the new character because the sacreds level is higher than your hero's. I propose a warning box pop up about this before the sacreds come off your hero to give a chance to cancel and prevent having to run all your gd's again to replace them. In my opinion this is an unnecessarily punishing "gotcha" that this fine game could do without. Thanks!