Custom Graph Widget - Custom Legend Issue

https://www.logicmonitor.com/support/dashboards-and-widgets/widgets/advanced-custom-graph-widget/

According to your page, this is normal behavior but, as shown in the image attached, the default use of instance name can be quite a hindrance to usability of the legend. I tried to define the Legend entry but that value gets pushed off to the far left by the defaulting instance value - which in most cases is useless and in this case is just a duplicate of the datasource name.