Atkins diet question (Only people who have done it)?

I'm in Phase one and we're supposed to have 20 Carbs a day... I got the bars they sell and on the front it says 3 Net Carbs. But 22 Carbs? Was I not supposed to have it? Because on the site I added it up, and it comes to less carbs. I'm having a hard time understanding Net carbs too.... Thanks.