| I have this problem at many fast food places.
To be honest I've stopped relying on nutritional resources for when I eat out because I often times get portion sizes that vary so much that the numbers on their website are less accurate than what I guess when I carb count myself! I try to base it on how much food there is, past experience with food like what I have eaten, and how the food tasted when I ate it (if it's richer or has an unusually sweet sauce I mentally decide to adjust my carb count a bit higher).
This sort of voodoo carb counting has served me well in the past, though you miss sometimes. The only food I've gotten where the nutrition facts are pretty consistent is fast food places. Restaurants (even corporate chains) vary for me every time. | 
