yes, the second form should be an update, not an insert.
In reality, splitting the form like this wont fix the issue you are having, with the form split like this, you will still run into the max upload file size limit when uploading since you still have 9 file uploads happening at the same time.
that is the hearty of the issue, having 9 file uploads at the same time.
You would need to create a main insert form, then create a second file upload form that will upload one file at a time and update the database with the new file name. This is going to require hand coding to determine which column the file name should be stored in and we will not be able to offer support for this part.