Info not saving via web

Im using a web form, and for each value in a checkbox field, if checked, their initials are put into a separate field, and this field is used to determine which additional forms are composed after the document is saved. My code is right, and i tried it in the onsubmit event, on the “save” button, and even in the $$return field, and when its saving, I see the info i want in the field right before the file is saved, but when i open the saved document in the client, the initials i wanted arent there!

that field is not hidden client, or have any type of hidden when code or options. Can someone please help??