I think that the first one makes it less likely for investigation to fail (even though my crew member failed when i sent him for the first time). I'm not sure about the second one but i think it raises the level cap of the crew member
Yup, just adds a chance for bad investigations to be good instead. Weird that you guys haven't noticed what the learning perk does, it removes the level cap from that crew member so they can be upgraded several times.
Yes but not because of that perk. Here powder monkey ends up being lvl 2 + 2 + 2 (2 for each bard). If they had that fur folk perk, they could be upgraded to lvl 3 making it effective level of 7 etc.