@Ascirc Thanks for the post. Taking a look I'm seeing things working normally, with 3 packs opened, the 2 you describe and the one from the BP. Could the missing one have showed up after playing a game for you? Sometimes when there are item acquisition glitches, reconnecting from the start menu or playing a match will unstick things.
If you have a clip you can host it on Youtube and add a link here, because the contents should of course be showing up when you unlock them.