When the Power Adjusts are connected Via the Aquabus it will only show any componants that are connected to the Power Adjust through the Main Aquaero 5 Menu's... Ie: If you have a Temperature sensor connected to the PA it will show up in the Main Aquaero 5 "Temperature Sensors" as "Power Adjust #".. If you have a Fan or fans connected to the PA then those will show up in the Main Aquaero 5 "Fans Tab" e.t.c.e.t.c.....
The Power adjust Firmware will be different to the Aquaero 5 Firmware, That's Normal.... The Aquasuite should tell you when the Power Adjust is connected Via the USB whether it needs a Firmware Update. If you don't get a Yellow warning telling you the Power adjust has a new update then it already has the latest firmware installed

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Have a look
HERE for more info on the Aquaero & various connected components. I'm Adding to this as & when I can, but there should be something there that may answer some queries...
N.