I started digging in and my laptop started acting up again (long story, nothing to do with your db) and had to quit for now. Too frustrating - will have to reboot (maybe, depending on what comes after this post). What I was working on is your form design. I followed your instructions and saw what I figure Isladogs is referring to. Problem is, your subform controls are way too big if you're not going to have scroll bars on your main form. You can't see anything below the first sub because you can't scroll on the main form, which has no records anyway. Turn on the scroll bar(s) for the main form and you'll be able to scroll down to where the other subforms are. See if that affects what you're trying to describe as the issue. If your subforms have scroll bars, then there's no need to make each subform control so tall. I don't know what you use to view this db, but it must be awfully tall (like a tv monitor) because it's huge on my laptop.
I didn't get far enough to figure out why you have a subform in the main header, as that can be part of the issue as well. If you can't scroll through a header or footer (I can't recall if that's an option) then it will never move. Wondering why it's not in the detail section with the others, as is normal.
I will support what's been said about making your db so hard to navigate through. That's fine for your own needs, but you ought to remove all the barriers that exist when asking for help. No reason why you can't do that in your posted copy and then incorporate whatever changes are suggested into your production copy. Things like no close buttons, control boxes, disallowing shortcut menus, making forms modal, etc. make it hard to help you. Given that we are just volunteers, it's asking a bit much for us to remove so many barriers.