My inbox is not synchronized between mobile apps and web mail. Some emails can only be shown in my mobile apps but not in the web mail. On 14 July 2017, I moved a grouped email into the Archive Folder using my mobile apps. However, that email disppeared suddenly in the Archive Folder. I made two restore requests to the Yahoo Helpdesk on 14 Jul and 21 Jul resepectively but I still can't retrieve back that email. Any help can be offered?