I was awarded double yearling badges for both the meta and main Unix & Linux Stack Exchange site. (Note, the picture looks like 4, but the blue looks like gray.) Check my profile to see. It's not my first time getting yearling for either of those sites, so it's not a case of getting my first two years in one go or something like that. Interestingly I didn't get a double for sci-fi meta.
This isn't affecting anything (more badges are better!), but I thought it was important to report.