Howdy, nems will travel all over a tank until they find a spot they like. It will probably move out of there if its not happy. Its probably just roaming. Just carful and watch where its heading if you have other corals. Once it finds a spot, it normally will stay unless changes are made to flow, lighting, anything really lol, but not guarantee.
Anemones need stable water conditions, we we recommend putting then in after about a year of setting up the tank. I believe @shakacuz asked this, but we really need to know how old the tank is, and if you are a beginner or not.
What the anemone is doing, could also mean nothing. They like to move around until they find the right spot, so it could just be exploring.