If you are eating some snacks or a light meal in-between the "two meals per day" then it is okay and is advisable. It also depends if the two meals you are talking about is two heavy meals, then the in-betweens might not be anymore necessary. 

This really depends on what you are trying to accomplish. Are you eating two meals per day because you just want to get rid of the fats? Or are you just trying to save some money? If this is your reasons then just don't do it as it will likely cost more if you get sick or something