Guild Wars 2

I got relocated here even though my problem isn’t the one you guys seem to be having. My bug is on the “Halloween Events Completed”, I’m on Tier 2, 2/5 and it won’t go past it. I’ve done tons of Halloween events but nothing happens… Here’s a screenshot:

I have done all achievements for Halloween, the only one I have left is “Halloween Events Completed”. The problem is that I am stuck on Tier 2, and I can’t get any further. I have done events which I know are part of Halloween, including those in The Lunatic Inquisition Labyrinth.

I would love to get that final achievement, so is there anything you can do to help? Considering how there is an entire year until I can get this again, please do answer quickly.