So the text on Mage/Elemental Wand says that you can use it once per round to cast a bound spell. This seems like it should rule out casting the same spell twice in one round.

That said, can you to cast the bound spell once from the Wand (as a quickcast), and then unbind it and cast it as your normal action? (thus sending the spell to the discard pile)

Or does it take a quick action to un-bind a spell even if you aren't replacing it with anything?