In perfoptions.ini, which is in "my documents/games/freelance" there is a line "asteroids", putting value more than 1.0 (say, 5, or 10) will increase asteroid spawn range. Though do try it in single player as I can't say if you will get anti-cheat triggered or not.
More seriously, in the event, I was Jumping dudes between Alpha and Gamma and the duplication happened like twice. Selecting one will select them both, btw.