Leith,
If you run the command "show version" inside the AP, would you be so kind as to share what firmware version the AP is on? There are a few different ways to update the firmware, but it would help to know what firmware you are currently trying to move away from.
For the on boarding, would you be able to share the output of "show capwap client"?
You are welcome to message the results to me if you are not comfortable posting them here.