To solve the problem with people mounting 2 standard RP licenses:
Currently licenses mounting point are class 8 if I'm not mistaken. Would it be possible to modify the standard RP licenses to be class 10 and modify one of the mounting point to only accept class 10 licenses? That way only one slot could be occupied by a cop, merc, smuggler or pirate license. Theoretical with this system people could still mount 2 ASF/CSF licenses but I think people wouldn't make that mistake.
mounting points:
1 lvl 8
1 lvl 10
licenses:
pirates: lvl 10
cops: lvl 10
merc: lvl 10
smuggler: lvl 10
ps: If I'm mistaken on how this works feel free to ignore my suggestion.