Unable to select Buddypress Profile field

The only option in the "Address profile" dropdown of the "Buddypress profile" settings is "Name".

From my testing, this would appear to be the wordpress username.

Is there something I'm missing? I've got multiple Profile Fields setup.

My setup is a Multi Network with Buddypress NOT network activated but installed in separate instances using BP Multi Network

Your thoughts are greatly appreciated.

Many thanks,

Robin