Ok I think I found the right stuff to resolve those questions above:
Commercial UAS Operations under Part 107
Webinar Question Recap
This single question helps to answer part of the confusion:
145. I registered as a hobbyist and then a commercial, what happens to my hobby registration?
a. Nothing. You can have one sUA registered both as a hobby and as a commercial aircraft. You could have two registration numbers on it. Remember, that while a commercial registration would satisfy a hobby flight, a hobby registration would not satisfy a commercial flight.
Commercial UAS Operations under Part 107
Webinar Question Recap
This single question helps to answer part of the confusion:
145. I registered as a hobbyist and then a commercial, what happens to my hobby registration?
a. Nothing. You can have one sUA registered both as a hobby and as a commercial aircraft. You could have two registration numbers on it. Remember, that while a commercial registration would satisfy a hobby flight, a hobby registration would not satisfy a commercial flight.