WotLK Weird Achievement Glitch

[Aoto]

So, I decided to track the Alliance-oriented Achievements for Midsummer, then decided to switch faction to Horde. When I logged back in, I saw that the achievements I was tracking as Ally were still tracked. Specifically, the Alliance versions of them. Clicking on them takes me to a blank achievement in the achievement log, and does not give me the option to untrack them. I have confirmed that I cannot track additional achievements, as these are taking up the place, and getting the Horde variations does not clear the Alliance achievement from the tracker.

What can I do, besides make a ticket to have my tracked Achievements cleared?

[Shred]

You can remove a tracked achievement by holding shift whilst you click it. (Or maybe it was Control. Just try all modifier keys)

[Aoto]

Thank you very much, that worked!

Shift, by the way, in case anyone else has this issue.