Oh that sucks, I'm sorry. Unfortunately there are a lot of not-so-honest breeders out there. Lots of ignorant ones too. (Again, ask me how I know.)
Hopefully it's nothing. I would isolate the puffy-eyed bird ASAP just in case. For that matter, maybe the other new one too? Just to keep a closer...
Did you quarantine the new birds for 30 days before adding them to your existing flock? It's been my (bad) experience that it's always risky to take in new older birds. (Older than day old chicks). Even from breeders. (Ask me how I know.)
This could be nothing, but it could be the beginning...