I have a query with two operations in the menu. One operation is CREATE DOCUMENT. Very straight forward. When I make this "applicable to multiple items" the query now has a select box for each row, but only one document is ever produced no matter how many rows are selected.
The second menu item starts a process. Also very simple:
PICK FROM OrganizationCandidateFormLetters (these are user defined documents)
DISPLAY DOCUMENT UserDefDoc.UDD_Name
This also produces only one document.