MTG Salvation

Suppose I cast Intuition or Gifts Ungiven (for completeness sake, the creatures are griselbrand, Elesh Norn, Iona, Shield of Emeria and Wurmcoil Engine) and two cards are hitting the graveyard.

Then I cast Shallow Grave. How do we decide which creature is the top creature in the graveyard?

1) Who decides what is the top creature in the graveyard for Gifts Ungiven or Intuition.

2) If my hand of Griselbrand, Elesh Norn, Iona, Shield of Emeria and Wurmcoil Engine were discarded by a mass discard like Wheel of Fortune. Do I decide which order I stack these creatures in the graveyard?

If two or more cards would go into the same graveyard at the same time, the owner of those cards decides their relative order in that graveyard (C.R. 404.3). This is the case whether they are put into that graveyard from a library (as with Intuition or Gifts Ungiven), from a player's hand (C.R. 701.8b), or otherwise.

I have asked the rules manager whether the "top creature card of your graveyard" in Shallow Grave means the "topmost creature card" in that graveyard, so that the effect works even if the top card of that graveyard isn't a creature card, as long as at least one creature card is there.

Thanks!