This is a new feature we added. All device-terminated SMS is logged to data messages with the topic _SMS_DT_
If you have a rule that you only want to pick up outbound SMS, set your rule to look for the topic _SMS_DO_
My rule is used to send outbound SMS messages back from my device. Incoming SMS messages are directly received by my device’s modem and outbound messages are sent back via your SMS route.
Ah ok it looks like you’re sending messages using JSON to our socket API. Instead of _SMS_DO_ in the route, put _SOCKETAPI_ and do AND with that. I think that should fix it.