Sorting by form filed ID is not working in directory. It seems it was as shown in an example in a previous post which I just commented on. Thought this should have its own thread as it seems to be a bug.
I tried running 3.3.1 version of this plugin to see if worked, but it didn't. I think it may be a problem between the latest version of Gravity Forms and the plugin. You can see how on the previous poster's site that the sort was working but is no longer working with recent entries. Wayne's Directory