Your not missing anything other than having the wrong slot selected for the sensor. But even when another slot is used the unit of measure will not be correct either. It will remain as "Degrees C" Futaba will not release the codes to reprogram this.
The easiest solution is to Rename the particular parameter and towards the end of the line add in the parameter unit of measure. The figure is still correct just the identifier isnt.

Failing this the best option is to upgrade to a Jeti