I just discovered what I think is a bug in the SE engine (confirmed it on SE, programmers and meta):
- Go to the Badges page (while logged in).
- Click the Tags button.
- Click the Bronze Tag Badge button in the lower right corner.
- Bug: You are shown with the silver tag badges!
You can see that the URL for the Bronze Tag Badge button indeed contains something like
&filter=silver so I guess that's where the problem lies?