Xpage: save a particular data source

I have what I think is a very basic question.

I have three xpages comprised of two different forms (form 1 and form 2) and one index page which displays both forms.

I want to be able to enter data into form 1, press a save button and create a document using form 1.

This works, however when I press save I get two documents: one for form 1, and the other for form 2.

Is there a technique to prevent form 2 documents from being created when I press save?