It is disturbing that in a home where your parents label their food and won't let you touch it, that your father feels comfortable eating food that obviously isn't his. It just seems like this problem has been going on for way too long. Are you still engaged and looking for your own place? I said it earlier in this thread-you need to find a place on your own and give yourself a chance to mature. I teach high school, and you sound like students at that level. I'm honestly not trying to be mean about it-if you have been controlled by your parents your whole life, then you haven't had a chance to be a grown up. You need this time on your own before you get married! I know you have stated that df isn't abusive or controlling, but I'm worried that you don't even understand what a normal relationship is!
I'm almost positive I've read your posts on other threads about what your children would do, and this is how you would handle your child, ....... Since you have been raised under the thumb of your parents, I'm afraid you are planning to repeat the pattern with your kids. I really hope you can see that this is not the best way to live the rest of your life!
Good luck OP.