Hmmmmm, I know that you can Add multiple website members but I haven't noticed a provision for multiple administrators @floorcookie? If you are looking to have someone only administer one of your GoCentral website you are correct in stating that delegate access will not work for you.
I cannot directly think of a solution to your issue. Perhaps someone who is more informed will enlighten both of us?
...turns out that my two cents is worth less or more depending on the current exchange rate.
roy darling *my posts seem a lot shorter in my head