Odd happening whilst ToTing
Yes, WAI. If you are granted a costume that you already have, it adds to the count for the badge but you don't get another of that costume and no text stating that it was received.
If the game spit out 20 dollar bills people would complain that they weren't sequentially numbered. If they were sequentially numbered people would complain that they weren't random enough.
Black Pebble is my new hero.
Plus, you can get Costumes during a Trick result. My BS/WP Scrapper was ToTing in Talos, and needed 2 more costumes. I got a Treat with a costume, and two doors later, I got a Trick, and the last badge.
And yes, you will get duplicate costumes. There are only 33 Costumes, and the last badge requires you to get 50.
ParagonWiki - Halloween Trick Or Treating

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Biggest Troll on the forums? I'll give you a hint:

Makes sense now. Thanks guys

Thelonious Monk
ok so I'm in RWZ on my WS, and I knocked a couple of doors
I got the following messages:
You received Respite
You received Respite
You received Respite
You received PPD SWAT Officer Costume
You received Enrage
Congratulations! You received the Fashionable Badge
You received Catch a Breath
You received Coralax Minion Costume
ok here's the thing: The Swat cossie was on one door, and the the followind Enrage and badge on a different door entirely.
Even odder, I only have 8 different temp cossie powers.
WAI?
Thelonious Monk