I am on Maxamum and I have that three times a day. I find breakfast the hardest, because Ill have my formula first thing and then I don't feel like eating until lunch time! =(
It's quite tricky because I am on 16 exchanges and I need to eat them balanced throughout the day! But I do understand what you mean, if I have my lunch time maxamum late, then I don't feel like dinner much either!
If you are given a set amount that you need to eat of protein then you should eat all your allowance so that it doesnt affect your levels. I do kind of force myself to eat just to ensure my levels are right! But yes I definately know what you mean!!