The Title and Badge are separate. You can have one, the other, both, or neither. They are set in-game.
The Title is there -- "Legendary Founder" just above the number of posts.
The Badge is not.
What I would suggest is changing your Badge in-game to something other than Legendary Founder, save, then switch it back to LF and save again. That should reset it.
No it will not affect your earnings, as they depend on the 'Mech not your Badge.
I'm a Legendary Founder, I just choose to have Wrath for both my Title and Badge.
Edited by Durant Carlyle, 09 March 2016 - 12:09 PM.