@Mary-Beth-Ericson - I can address #2 for you, since I lived through this a year ago when I converted. At first the "conversion credit" wasn't working properly, but once they resolved that shortly after, it was great!
The most important thing is for you to have VRBO or HomeAway listed as your Source. This is what gives you the credit.
Even if someone calls you on the phone, ask where they found your listing, and enter it as the source. If it's VRBO or HomeAway, you'll get the conversion credit. I have plenty of guests book with a phone call after seeing my listing and now I get the conversion credit.