Technically, the rules describe discarding a card as flipping it face down, since you need to keep the card around for scoring purposes. So the way Tomax is worded makes sense with that in mind: you discard the card by flipping it face down, then Tomax's ability flips it face up, thus "un"discarding it.
Given that the most recent FAQs changed the way discarding is described (presumably to account for Dual Cards) I suspect Tomax's wording will change (either in the box, or by errata) to account for that.
It's obvious what the intent is, but I think the exact wording doesn't match the rules any more.
There is no FAQ change concerning discarding.
Sorry, the Tournament Rules
