Hi Tymbow
I had same issue, iAPs 105 has no problem upgrading.
My scenario is similar to yours upgrading the iAP 205. I did a manual upgrade with no reboot option in the web GUI.
After the upgrade said succesfull, I left the APs untill late evening to reboot.
Rebooted and only 1 was back into the VC/Cluster. The problem was that it still booted into the old image...
So eventually I had to ssh into each iAP205 (Some with local user admin and some with my Radius account), I confirmed that the upgrade image was in the backup partition with the cmd "show image" and verify the image it was booted in with "show version".
All the AP's booted into the primary pation, but the old image was on the primary partition, the new image was infact on the APs, but in the backup partition.
"show image" output:
Primary Partition Build Time :2015-05-12 10:27:51 PDT
Primary Partition Build Version :6.4.2.6-4.1.1.6_50009
Backup Partition Build Time :2016-05-29 23:07:01 PDT
Backup Partition Build Version :6.4.2.6-4.1.3.1_55246
AP Images Classes
-----------------
Class
-----
Taurus
ssh back into all the AP's and then I did the "switch-partition-reboot" cmd on all the AP's at the same time and after this they all come back on with the new image in the primary partition.
verify commands:
"show version" and "show image"
Hope this helps. as a side note, one AP took about 10min to show up in the GUI cluster.