I too went down a rabbit hole trying make sure each segments Advantage miles on an AA RTW ticket were credited. In my case all the segments flown on one ticket number are credited in one activity listing on the AA website (I had Europe travel on one ticket number; then I made a change and got another ticket number so now all the segment's mileage shows up on that ticket number). Also the date of the activity for the ticket is the first segment date. Click on the activity item to see the details of each segment. This was confusing to me since the ticket number changed in Oct. and I was looking miles from segments taken in Nov and Dec. The AAdvantage service desk could not explain how to see my miles but they did open a ticket so that an IT person emailed with the instructions to click on the activity listing.