I deleted a site from 'Favorites' why is it missing from my whole Vault?
Sites listed within the Favorites folder are shortcuts. The actual location is elsewhere in your Vault. Deleting a site within Favorites will delete the site from the entire Vault. To remove a site from the Favorites folder, click on the site's edit/pencil icon and uncheck 'Favorite.'
To recover the deleted account, go to your LastPass Vault > More Options > Advanced > Deleted Sites > find the desired site > click 'Undelete.'