Actually being a clone I am suprised it didn't either butt right up to the original, or move to the well lit area on the other side of the same rock.
And for what it's worth my anemone has never wedged itself in, it is on a fairly flat surface of a bridge in my tank attatched on the underneath and stretching out, and was there for about a year, it has split there three times and each time the clone has stayed right next to it. I just got rid of two of the anemones to my nieghbor, the other moved over and spread wide open nice and happy still. but this one is a bit wedged.