I wonder if part of the problem is from updating the item cache from the armory, which didn't turn up a lot of the items. I tried the Edit Items function to look for a couple of the items. It appears some were there and some were not.
Totem of Quaking Earth: on the list
Pauldrons of the Devourer: absent
Dexterous Brightstone Ring: on the list
Mark of Supremacy: absent
I'll try updating from wowhead again and see if that helps. If they're not shown as being bought with emblems of triumph, they may be getting filtered out.