Ultrasonic sensor numbers don't make sense

[weilin]

What ports have you plugged your ultrasonic sensor?

Assuming it is V5 - they need to be plugged into special ports:

@jpearman

Encoders must be plugged into the ADI such that the top wire is in an odd numbered port (1, 3, 5, 7 or ‘A’, ‘C’, ‘E’, or ‘G’), and then the bottom wire must be in the next highest port number.