DataGridView sometimes won't delete

[jmcilhinney]

Working with controls on top of other controls in the designer would be difficult

No, it wouldn't. There's nothing complex about it. You simply add the controls to the form and set the Location and Size for at least one of them in the Properties window. You now have two controls occupying the same space. You can work on the one you're looking at and if you want to work on the other, simply right-click the one in front and select Send To Back or you can use the Document Outline window. There's really nothing to it.

there would have to be logic to hide/unhide controls on the last page.

Huh? If you have a DataGridView and a Panel then you simply call Hide on one and Show on the other, or toggle their Visible properties. It's less complex than you have now.

It's working fine now.

If that was the case then you wouldn't be here.