Marnie is having issues backing up her folders with Carbonite. It says it can't back up because folders are being synced to DropBox. Leo says that's likely true, and that both are competing for the same files to back up. It may be that Carbonite has to wait until Dropbox syncs before it backs up. Leo says she can stop DropBox, uninstall it, and then reinstall it. That could make it much easier to work with.
(Disclaimer: Carbonite is a sponsor)