Royal Gramma and BlackCap VS False Percs

[eternitybc]

So we have a 55 gallon tank that our two clowns see as all theirs, mostly because they have been alone in it for a while. Last weekend we added a Royal Grammar and a Black Cap; the fish store guy said they would be ok but looking now posts online are cautioning against it. That being said the two new additions picked rocks right next to each and barely notice each other as it’s the clowns being the trouble makers. It’s actually kind of weird, whenever the Blackcap or Royal venture away from their rocks the clowns rush over and do a belly dance near them. No nipping, it like they are trying to land there belly on the other head… I’m wondering if this is temporary behaviour being only day 3? Are the clowns going to slowly get used to them and give them more space or is this all going to go horribly wrong?