Had rude server TWICE at the same establishment. What words are best to use in ltr to Manager?

My husband and I visited the Studio Movie grill late last night. We spend tons of money each month at this location. Sometimes we bring all three of our children, and other times we bring friends. We've told lots of people about this location (there are several). Last night, while watching X-men, I ordered the rib and frys basket (my order on the regular). I always look forward to this meal. Normally the portions are generous. I was into the movie when the server arrived but did briefly notice how small the portions seemed. I was starving, so I just grabbed a rib and bit into it, but I immediately noticed it was mostly bone with maybe a hair of meat on it. So, I grabbed another one, still into the move, and nibbled on it and noticed it had barely just a little more meat on it than the first. Frustrated, I decided to look into the basket and noticed there were 3 super short and tiny sized ribs left with barley meat on them, and the french fry portion was small. I told my server who said he'd take it back to the kitchen. A few minutes later, a different "server" walked up to me and said, "Excuse me, next time you have a problem with the ribs please do not eat any of them." He smirked, then said "It looks kind of strange when you're giving it back to us. But we are cooking you another order and this one will be on me." Trying to get back into my movie, I just said ok. Almost a whole 15 min later, they bring the order back out and everything looks and tastes a lot better. After giving it much thought, I decided that my husband and I spend too much money on this place each month for the server to give me a lecture. I felt he should have just relplaced my order, no questions asked. I then realized, this same rude server was the same server that was pretty rude to us a few months back. My husband and I reseverd our movie seats online. When we arrived, we showed our tickets and was escorted to our reserved seats. Five minutes later, this same server came over to take our order but the first words out of his mouth were, in a very stern tone, let me see you tickets to make sure they are reserved." He was suspecious and asked for us to prove that we belonged in those reserved seats! He then smile, became nice and said, "Ok thank you, you know I just wanted to be sure you weren't sitting in somebody else's reserved seats." EXCUSE ME?! So I feel I've had enough with this server. My experiences are awsome when he's not around. I feel it's time to report his rude behavior but I want to word the letter to his manage just right. Please give me examples of how to phrase or write words that will express my dissapointment with this server. I do want an apology from managenent. But I want my letter to be as short but to the point as possible.