Treasures of Ohn'ahran Plains

I couldn’t loot Yennu’s boat on the character I wanted to because I had already found it on another toon, yet the achievement is not account wide. So I switched to that toon to complete the rest. Now I’m having the same problem with another piece of it. Do they expect that we’ll do these on EVERY character? That’s absurd. That’s not even possible anyway when you are locked out on a different toon. That means no one toon of mine can get this achievement.
Tickets are now taking 9 DAYS to get answered?!? And then all you get is “check wowhead”. Do they really think people don’t search first? And then another robotic answer that is no help at all.

Worse than 9 days, you’ll then get a “helpful” link to wowhead.

It’s so ridiculous