I saw it too.
Man are those discuses Mad.
Seriously something needs to be done. I would vote for divider. And remove it after a period of time... I would say a week. If that doesnt fix anything (i sorta doubt it will fix the problem tho) then i would rehome the smaller, less active one or the one that hasnt paired up... thats what i would do.
edit: Im assuming u dont have another discus tank to use seperating the males.
Goodluck. and Beautiful fish btw.