So someone is upset because they disenchanted a card without checking to see how much dust they'd get?
AND they ignored the bright green number right below the button they had to push telling them exactly how much dust they would get. Sympathy - and any sort of restitution by Blizzard - would definitely be contraindicated here.
I totally agree with the two posters before me. Lack of attention is not the game's fault.
will both of my Yoggs give 1600 dust?
And isn't there a safe mechanic that allows you to undo the disenchant as long as you don't exit the pop-up window?
It's been verified that dusting Yogg will give you a random amount of dust. You might win and get 5000 dust, but most likely Yogg will die and you'll get nothing.
This statement is demonstrably untrue. You get exactly the amount of dust as shown on the disenchant screen.