Yep, my two are always together. They swim a lot following each other around in circles. They also hide in the same corner when the lights come on.Yup it started out as a dud.
I think these cats do better in a group. Yours seem to always be together in the vids and Fish Tank Travis reports that his two are also joined at the hip.
My lonely guy tries to swim with the Polys and occasional jag cat