Is it possible for a user to display the same badge twice?

How about 6-8 times?

Lets say there was somebody who wanted to buy 8 Taeyeon's badges.

Could they have this?

asking for a friend

Quote from ghostings

Yes

2 max though

Only 2?

Quote from ghostings

And it's a random badge

This is a bug

Quote from whorerwin

I wish I could see 8 Taeyeons in a row

This is a damn shame, we deserve 8 Taeyeons in row or at least 6