Originally Posted by
ESpen36
Fascinating. It would seem that the iPhone App has a different way of accessing the check-in system, and for some reason it is less buggy than AA.com!
Yes, it should be considered a bug that the page shows you all legs, only let you check in same then won't give you option to check in the rest.
On iPhone App, there is a check in button under each leg so you always have the option to check in the other legs.