While browsing the 10K tools undeletion queue I just noticed that a handful of questions with two undeletion votes are now stuck in limbo, impossible to get the final undeletion vote, because they were deleted by users who later become mods in the recent election, and the deletion votes have been (effectively) retroactively granted moderator superpower. It is not clear that this is the intended behavior, esp. since many of the candidates wrote in campaign statements that do not desire to cast such superpower deletion votes. Does SE actually intend that such votes be retroactively redefined as moderator votes, or is this a bug?
Robert Cartaino, Director of Community Development commented on this subject some time ago:
No, I don't (personally) believe all previous actions of a user should become "Moderator actions" (capitol 'M') once they gain that diamond ♦. [...]
In that same vein, any official actions taken by a moderator♦ should not suddenly become un-official, should they relinquish their position.
As for handling these cases, it may be an oversight… a bug… or just one of those pedantic, edge cases not worth devoting the resources to right now. That's a discussion for another party.
It appears that SE is aware of this issue and possibly considers it as a bug, yet fixing it not a priority. Since some time elapsed it might make sense to recall that this is an open problem.