Thanks for a separate opening a ticket in our Help Center. This issue is now resolved on your account.
Future reference for other users: when there are no settings in the DM category and there is only a blue "all" button, it means that no DM's will be posted. The "All" button is deactivated. It will look like this:
If you click it and it turns green, the setting is activated:
To delete this setting hover of it and click the setting wheel that appears. Then in the dialogue window click "Delete":