Does Touch of Moonglove need another "this turn?"
Given the Oracle wording on Bone Shaman (as pointed out by @ArcanistLupus in the comments), I would say it probably should have another "until end of turn".

Bone Shaman's Oracle text


  {B}: Until end of turn, Bone Shaman gains "Creatures dealt damage by
  Bone Shaman this turn can't be regenerated this turn."


Clearly someone at Wizards decided that Bone Shaman needed similar wording to be more clear as to the purpose of its ability.  I would guess that Touch of Moonglove's wording is just an oversight (or maybe whoever wrote Bone Shaman's Oracle text wasn't involved with Touch of Moonglove).

Ultimately though, as you've pointed out, the intent was obviously not to deal with all creatures damaged throughout the course of the game.  You could try to rules-lawyer it that way, but I doubt any reasonable judge or playgroup would allow it to happen.