I guess it depends how big they presume your serve is. But do remember the carbs in all of those herbs and spices do add up. They are all carbs after all.

Just for the heck of it I popped the ingredients into MyPLAN (except dill - for some reason dill is not there, but I found it at Calorie King) and the result is below.

For the entire recipe of Ranch Seasoning:

Calories: 349
Carbs: 54.3
Protein: 15.4
Fat: 9.2

For whatever reason, they assume no fibre. But since you'll be eating such a small amount at a time, I shouldn't think that it's worth worrying about.