AML to Update List Property

Good day.  I added a list property to a few ItemTypes with a default value (itemtype, default value is the ItemType ID).  When I create an entry the field is populated and identified correctly.  When I try to update other entries using AML (Nash or Batchloader) the field has the correct information, but it is not recognized when I search the field.  

Example:

DEMO-14

- this is the newly created entry

DEMO_PDF

- crated previously to the itemtype property being added

I used Nash (and Batchloader to make sure) to update the property to the ItemType's ID.  When I perform a 'get' action the fields display the exact same information.  When I perform an Advanced Search, select the field, and select the appropriate Label from the list, only DEMO-14 is returned.  

I'm not sure what I am missing with this.  Thank you for the help.