it could be a problem they will usally declare a singing war on each other . What size tank are they in ? I would get rid of one or the other it is not worth having a sting war going on , that could end up killing the whole tank . From what I have read anenomes should be kept alone or in large tanks . Best of luck
They may be fine, as they're both the same type. If they're together and you don't notice either shrinking, then they're fine. These guys can MOVE, and will do so if one gets irritated by the other.