More Info Tab Disappeared

A little while ago I switched all the listing options people could make on their listings to ‘details page own tab’ to make it clearer. Now this shows too many tabs on some listing that select a lot of options so I’m trying to shift some of them back together into a ‘more info’ tab to reduce space taken up.

When I go to the ‘show in what locations’ for the necessary options, I deselect ‘details own tab’ and select ‘more info tab’ but when I save and refresh the listing it shows it on no tab at all and the ‘more info tab’ isn’t showing anywhere. If I have ‘details own tab’ AND ‘more info tab’ selected it shows the details own tab but still no more info tab at all.

Do I need to do anything else to make the ‘more info tab’ reappear on listings (Is there another setting elsewhere I have to select so it shows this tab?). It seems to be sending the info there but then not showing it?

Thanks