If the anemone was a bubble tip anemone, then wandering is just what they do. The only rule about them is that they will settle down someplace where you don't want them to be - behind a rock, or some other place where a decent ******** decorator would never place them. There are lots of suggested methods for "encouraging" a BTA to locate in a desirable place, but none have ever worked for me, so I just let the animal make its choice and I live with it. That is much healthier for my mental status.