On the customer ID I believe that it is issued when you get your hunting license and it is your SS number. I have been doing it for 26 years now and the license ID # has been different every year.
I believe that you can't play the one license for 2 years in Az. I know that you need a valid one to put in for the draw that is good to the last day of the application period for that draw...so that kills the 2 years on one license. And if I remember right the bonus points application period is the same time as the draw applications is.
On the hunter safety, you can do a online course with Az but you need to do the shooting or final test in Arizona from a approved instructor, or something like that. It has been a number of years since I looked into that.
One thing on the Az hunting license is don't let it just go to waste. They have fantastic quail hunting and if you can swing it the spring javelina hunting is additive.
If I got something wrong here I am sure there are a couple of members that will correct me.