Works as designed.

1. When you shift-A a feed or folder with "show only unread" mode active, there's really no point in removing articles from the screen. Leaving them visible lets the user to undo the operation fully or partially.

2. When the user moves to the next feed or folder with shift-N, it's not guaranteed that the user wants to load the contents (especially if the user has automatic "mark as read" mode on). The user might very well want to skip to the next one without loading the contents. Therefore you need to press shift-O to load the contents. So shift-N, shift-O combination is the magic.

You can reach us via the Support email address that is on the front page of the Feedbro app page here in AMO. Reviews aren't meant for support requests or bug reports.