Yes, and often!!! I find it depends when someone has inputted the food in the first instance on the app, and put the details in per serve, or say 2 pieces, rather than 100g. When I input a new food, I always just add the details in for 100g for more accuracy. Otherwise, when the next person comes along, how do they know what 'one serve' of that food is???
Maybe I'm wrong, but several times at the start I'd input '1 serve' or say 1 cup, and because the initial data was inputted either incorrectly or with a vastly different serving size to what I thought it was, I was getting crazy numbers! I also find some foods which are there, yet have no nutritional data for them. Therefore, if you click on them, your overall macros don't change and that food isn't counted!