I think there is a glitch with the Wiki Editor badge.
It’s supposed to only be awarded the first time you edit a wikipost, but I keep earning it again.
That is, I get the notification that I earnt it again and the date of earning jumps further into the future – but the badge isn’t duplicated on the badge page.
For instance, right now it says I earnt it two days ago. But I first started editing wikiposts at least two weeks ago, perhaps before that.