I would recommend adding divider lines to allow cleaner grouping or sectioning of fields in a form. It would also be helpful to have "blank" field for better organizing when adding fields in two columns but the number of fields for a particular topic is an odd number. Having a blank filler field would allow starting the next topic on the next row rather than beside a field that isn't related. This would make the form look cleaner and be easier for end-users to follow.