My nintex form is linked to a sharepoint list. When, the check box is toggled for the first time, it populates the associated ts fields with the user and the current date.  Upon completion, the associated bln field should change from false to true.

The issue is that when the check box is toggled for a second, third, etc. time, it should overwrite the associated ts fields (one for date and one for name. The associated bln field should remain true.