Hi Bez

I had exactly the same problem with the Macadamia Nuts and Fitday. In the UK, our labels list Fibre and Carbs seperatly. So, if you don't deduct your fibre from the carbs, you normally have to add the 2 figures. Fitday does go over the top with the counts sometimes ( you will see, that it insists on Bacon to have carbs - in the US it has, here it normally hasn't).
Your best bet is to enter foods into custom and work from there. I know it is a lot of work, but it helps, especially as our labels give you the amount of carbs per 100g, and Fitday usually measures stuff in cups ( no idea how much 1 cup of fried egg is ).

Good luck
Sabine

PS.: I will by a carb counter later in Sainsburys. I hope it is produced in the UK and doesn't just copy the US list. Then I can help out if you are stuck again