Strange ball glitch.

I loaded my room and found one of my pet balls a weird colour -

http://img196.echo.cx/img196/9278/petballglitch1pa.png

I know the colours sometimes change when you stack them, but it isn't stacked. Neither is the slightly silver one next to it.

just rollered together, i've done it loads of times

I already said, not stacked or flat stacked.

Maybe when the pet was playing with them they went together!!!!! :D