i probably don't have the necessary breeding experience to offer any real insight, but is it possible that this is an instance of groupthink? since it's highly unlikely that you made a mistake in record-keeping AND that a first-time breeder laid a small clutch sired by three different males, isn't the simplest explanation the best here? couldn't the cinnamon have sired both a normal cinny and a pastel cinny? they're both co-dominant mutations and you seem to have a lot of luck with the odds.

if that's the case, it's certainly an exceptional pastel cinnamon, but it really doesn't look much like a super pastel. also, the patterns on the unknown and the cinnamon are so similar that it's hard to imagine they weren't sired by the same male. you might have something 'extra' floating around in the cinnamon or you might have a dinker (because he also looks a hell of a lot like a firefly), but isn't it most likely that you have a really bright pastel cinnamon?

in any case, they are all outstanding.