Can't sreate a second aggregate graph

[EoinDubh]

I am running Cacti 0.8.8a with the Aggregate plugin version 1.01. I have created an aggregate graph for one server with 4 CPus but for some reason I can't find a way to create one for the other 3 multiple CPU servers that I have. There is a Aggregate Graphs link under Management but that page only shows the existing graph with no link to create another. Possibly it is just too early in the morning and I have not had enough coffee yet but I am stumped.