Hi OlympiaDiscus,
The two fish with the darken faces, sounds like they are either pushing each other to establish a peaking order or perhaps forming a pair and defending against other fish. I would give these fish a good week and see if every thing resolves it's self. Let the fins and gills heal from shipping. How did you acclimate the fish to the tank; drop and plop or drip? Also are you aging your water?
Pat