Everyone Needs a Logo

White and slightly more frustrating than your average achievement

I have two guilds. One already had a tabard, the other didn't.

I can't get the achievement on the guild with the existing tabard, but I got it on the guild that had no pre-existing tabard.

Also, it's NOT a reputation thing, as the guild that got the achievement is an alt guild and I think this is the first time anyone in that guild logged a toon since the expac was released. My toon (the GL) has 0 reputation in a guild that has 0 experience.

I tried several things in the "can't get the achievment" guild, including vendoring my tabbard, having everyone who was online un-equip them, changing the logo (drastically and slightly) and nothing took. I spent about 50g on guild crests trying different things.

Seems bugged to me, unless anyone can think of something I haven't tried.

Yep. This achievement, sadly, is bugged.
I asked GM to fix the status of my guild achievement, but unfortunally the GM is not able to do that.
At this state, there is no way to get this achievement in a guild where it's been bugging and there is nothing you or even Gamemaster could do.
Screenshot of my GM-Ticket: http://kuvaton.com/k/RIN.jpg