Anyone else have fish that do "odd" things?

[mastergunsg]

I have an ongoing battle with my regal tang! every time i add a new frag to the tank it takes me about a week to get it placed where i want it and not where my tang wants it. I have tried to glue things down right away but the tang will get mad and pull relentlessly at the frag. If i just let him rearrange things and me putting them back where i want it everyday after about 5 to 7 days he will tire of the game and leave the new item alone. Its actually quite amazing at how large an item the tang can pick up and move