New APs don't show up on Aruba controller

We have a new Aruba virtual controller for new wireless access points: I've added two new access points, for a total of 13. Two don't show up under active access points, only 11 show up. The switches are set up the same as all the others: vlan 5 for AP Management, vlan 3 for Guest, and vlan 10 for secure wireless.  One of the access points is on a switch that has 9 other APs that do show up and work. When I look in the Maintenance option on the controller, and then the Configuration tab, I can see the information that says "Allow-new-APs" and 13 access points show up in the list, but only 11 show up under Access Points. They all have lights, cables, and power.