Folder order

It seems I am going crazy! All of a sudden one of my accounts has placed its Inbox and its sub-folder under a “More” sub-folder, which is way down the list from the Account heading.
I have tried dragging Inbox to the Account heading but it won’t move and I have tried to delete “More” but it won’t.
How have I done this and how can I correct it?
Thanks

Hi Peter,
sounds like you just hid the folders by accident.
Right click on the folder you want back from the more folder, and choose the option “Show” instead of ‘Hide’ or ‘Show if unread’.

Best regards,
Olivia

That was it ! I wondered how I did that without knowing it ??? 

Thanks
Peter