You can buy two more licenses for unit 23 or any other unit(s) that are not an exception type unit. Just go in and click on reduced antelope tags, click on 2 licenses, and then go through the list and highlight what unit(s) you want them in, and click on them. If they are in a unit where you can buy them, it will accept it and reserve them for 30 minutes for you to pay for them. I just tried to buy 4 licenses for unit 23 and it let me, but I just hit exit and left the screen.