Unified inbox. Have to delete messages twice (first time only marks them read).

Unified inbox. Have to delete messages twice (first time only marks them read). When I delete a message from the Unified Inbox by swiping right (and confirming) it only gets marked as read and not deleted. Have to swipe right once more (and confirm) to make it disappear. In the normal inbox it is deleted at the first swipe to the right. Why does it only get marked as read at the first delete in the Unified inbox? A bit annoying having to delete evey message twice in the Unified inbox.