They display per tray priority, the lower the number, the higher the priority, so just change the priority to match the order you desire, but remember, this will also mean the 2 high cap trays (3+4) won't get used until 1 and 2 are empty.
Login as admin and go to Device > Tools > Device Settings > Paper Management > Tray Settings and set them lowest to highest
And then they will be in the order you wanted
