Configuration array only returning first item

Summary

My Recommendation rule returns multiple items (comma delimited), but array only shows first

Content

What is the trick to get the array to show all the returned items.   I have both the array controller and item attribute  in the Recommendation Rule action.  I have the array controller returning the count of recommended items.  I have the item returning a comma delimited string of items.  I can see it works in Debug.  However, I'm only seeing one line in the array in my configuration screen.   I know it must be something little and stupid, but I just can't find it.   Any help?