New Angels fighting

Its me again.. I lost one of my new Angels yesterday and went today to the same aquatics fish store to buy another smokey. They had just got some new ones in today so I bought 2 more .. Looks like they come from the same place,they both look alike. They are smokey blue veiltails.
They are fighting now.. I have other angels and never once did they fight. I thought it was a myth LOL..
But these are mouth to mouth fighting. I don't know if it is stress from being shipped to store, and bought in the same day.. Should I leave them to work it out? My other tanks are a cichlids tank and other is a shrimp tank .. I figure they are siblings, will they get along? Ha ha, well I laugh as I type this listening to my 2 teen daughters argue..

I had 3 before, added 2 more.. I had the other 3 for a week. I just got the 2 new ones today and they are the ones fighting, not the others. As of now, I turned the lights off and each one is on the other side or the tank. They are in a 60 gl tank. Hope all is okay for now.. I am hoping it was stress from being in the bag together on the drive home plus being moved twice in one day..

Well they are doing great today.. I kept the lights off the tank till today.. They are right near each other too and adjusting just fine. I feel so much better now.. I think since I bought them yesterday and the store just unloaded them and place in their tank, then I bought them an hour later and drove 30 minutes home with both in the same bag... they were just tired LOL..
I will keep an eye out for sure tho.