I was in discussion with scottishpoet about this. We have both noticed some "fused" boarding passes which are some weird mix of the current and a random previous flight. This is if you select from the main / front page of the App. If you instead move on to View and Manage, on that second screen the Show Boarding Pass you should get the right one. This is on non-Samsung Android. Doubtless it will get fixed in the next release or two. Here is my fusion, chance would be a fine thing....