Think I got it.
Found this on the net….
You need to stop the spell lists from doubling up when they're displayed in the Library. So change the fourth line of the client file from <d20spells static="true"> to <d20spellsMine static="true"> (or whatever). You also need to change the change the closing element (further down the file, right above </library>) to match, from </d20spells> to </d20spellsMine>.