Can't find custom property I added in drop down list to allow me to "group by" when selecting nodes for config change template to run on

I created a custom property which I planned to populate with a value which would distinguish it and allow me to choose this particular node to run my config change template on. However when I go to choose nodes on which to execute my script on it is not available to select from the dropdown list??? I can go to my custom property editor on my NPM server and see it there right in front of me but when I go to use it as a selection criteria when using a config change template its not available!

It is however, a property with which I can group nodes from the "Manage Nodes" page of my web console? Anyone encountered this before?