Mapping fields verification back goes back to existing settings instead of new slate

After selecting your file and default source and assigned to, etc, you map the fields and then go to the verification page.

If on the verification page you notice something isn't right, or the notes tell you that there is an error (which should be highlighted in a pop-up modal or something more than the little text line above the green import button [separate issue]), when you click "Back - something's wrong" it takes you back to the complete start of mapping rather than letting you fix the mapping settings you were just verifying.

Can the back button take you back to the mapping page and retain all your settings so you can edit one and verify again rather than re-mapping 20 fields some with lots of sub-options?