Hi Nate,
For pulling the data from a catalog/operation there has to be a default operation (there is a radio button on the right hand side of the list of the operations in ezEdit.
If no default operation is specified then the 1st operation is considered the default operation.
You can't display fields that don't come from the default operation (except the custom fields that can be used to build things on the fly).
Please check the product docs for more details.