Then it must be that the level cap has been set to 85 already.
But we're not able to gain experience beyond 80th yet.

So the extra gold, from being at the level cap is gone.
And we would be gaining some experience from these quests again, assuming we were able to accrue exp.
But since we're not... we are only getting the gold portion at this time.

If the quest log is filled, and we're bound in Stormwind/Ogrimmar.
We turn in a bunch of dailies, get some experience... and then hearth.
And do the Cataclysm leveling process.