Bonus on 141 vs 140?

Unknown

That max level bonus per power that is on the character post means that you get abonus for maxing your char?. I always thought it refered to have the 5 covers but now I realize it may be being the max level you character can reach.

over_clocked

Yes, 141s receive their final small scaling bonus when leveled from 140 to 141 (only for scalable abilities). There's usually no reason not to max a guy if you are already past 115-120 on them.