Geoff is correct when it comes to the Windows 10 version - the one you long press does matter, as that will be the first one in the list. Then if you tap "Select All", it will select the rest from the top of the list. I'm going to change this behavior so that it doesn't matter which one you select first - if you tap Select All, it will select them all from the top down. On Android, it already behaves this way.
Mike
Mike