I have heard and was told that when clown's do this sort of thing, they are being harassed. What other types of fish do u have? My did the same thing when I put um in. I had some azure damsels that are like little kids teasing them or just trying to show them that there not wanted. After a while they settled down, but they stayed the opposite side of the tank for the remainder of there life. Give it some time, it should get better