sounds like your poor clown is getting the run around. I had to let one of my clowns go for the exact reason, Had 4 clowns, two pairs.
AT first had only 1 large rbta, and the two would keep the other pair at bay. Invested in another rbta and the one clown in the "forsaken pair" turned on his buddy. He than started hosting my hammer, and got kicked out of that too. Eventually all 3 clowns picked on him to the point that i had to find him a new home. Bunch of jerks!\
Hope your clowns figure it out and yours doesn't need to find a new home. lol

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65 gallon saltwater tank, 60lbs live sand, 85lbs live rock, 2 ocellaris clowns, spotted goby, Flame hawkfish, scopas tang, numerous corals