You need to get rid of 2 segments to get an eticket. In most cases etickets are only possible for itineraries with less than 17 segments; you currently have 18 segments.

Also, some airline systems may experience difficulty trying to create etickets for itineraries with open dated segments.

I'm not sure about the rest of your questions but I'm sure one of the gurus will come along to answer them in a sec.

Welcome to FT.