The horn honk on the second lock attempt is normal operation and I like the fact that the horn will honk twice if one of the doors is ajar when using the fob button. When touching the black square it won't lock or flash the lights when a door is ajar. Sounds like the BCM update has changed this feature ...I prefere it the way it is originally.
The horn honk feature is handy when using the FOB to find your car in a crowded parking lot or when it is out of the line of sight and you want confirmation it is locked. So does yours still honk when using the fob button? Or you just lost the honk when using the IA touch pad?