The station is able to detect multiple MTws, which you can view as "children" sensors, under one of the functions. However, the station is only able to send data (on available) from the sensors one at a time. So you need to match up the incoming data to the right sensor.
For example, you are using two MTw sensors, A and B. You can see A and B listed as detected by the station. You need to make a note of those sensor IDs. On data available, the station pushes data, containing the sensor ID and its data. You need to check that ID to see which sensor it is, say A, then assign that data point appropriately to your A data stream.
