Troubleshooting: My page is sending messages that are not setup in MobileMonkey
1. Check if another Automation is setup on Facebook Page's Inbox
Select Automations.
Scroll down to "My Automations"
2. Check if there is any old automation setup
You need to disable/disconnect/ remove any other App that is connected to your Page that you do not need anymore and may still be sending messages in behalf of your Page.