If the form is trying to scan to the wrong assignment, then you have printed the forms for the specific assignment. If the assignment name is on the form, then you can only scan for that assignment. If you want a form that will scan for any assignment, then you will need to print a generic form.
Please send along a screenshot to email@example.com of a form that will not scan correctly in the scan window so we are able to see if there is anything that needs corrected.
The form code reads what information was available within the parameters of the form being printed.