Sometimes I have perfect bowel movements but other times when my BM's are a bit slow I increase my coconut oil intake to no avail, but when I increase my animal fat intake I spend 5-10 minutes in the toilet with diarrhea and accumulated crap from days before. Its great that animal fat gets things going but does it always have to be diarrhea? If I increased my animal fat consumption and decreased my coconut oil consumption would I adapt? Is this reaction to animal fat normal or is it some type of allergic reaction? I have been Paleo for quite a while, but in the six months I have been "paleo" most of my fat came from coconut oil.
Not sure why the dairy is having that effect on you, but my first thought is that your body doesn't know what to do with it, and more specifically, you're probably short on the necessary gut flora to digest the dairy fat. If you really want to be able to do dairy, you might want to try building up more diverse bacteria. I can't say that it will surely be effective. Some people have had success doing that, but others say no matter what they try, they can never digest dairy. Every night when I go to bed, a shed a wee little tear just thinking about it. Seems so sad to me, since I love good pure dairy and do quite well on it.
As for the coconut oil fats, you likely digest that more easily due to the same reason that people without a gallbladder can. It's because they are MCTs, and although it's still a saturated fat, it's metabolized differently.
I knew (lived with them as a roommate) someone who inherently have difficulties digesting animal fats. The intestines themselves were damaged. That would include ANY type of animal anything; milk, meats, soups, etc. She had to live with better food/health habits than most people. Like she had to go out for a morning jogs to jump start her digestive system for 30 minutes each day, and if she did eat animal fat (like when someone would serve chicken noodle soup) she had to sooner or later use an enema bag to flush it out. She would be fine with plant-based oil/fats like olive and coconut oil. Sparingly she could have deli meats and cheeses, but that was the only type that she could safely eat. In her case was that her whole family had difficulties eating animal fats, but it was made worse when she had food poisoning in (Italy? No sure, somewhere in Europe.). Food allergies, intolerences, etc., are most like the culprit, but if you have and serious enough food poisoning, it's a possibility. So I just wanted to throw that idea out there.
I'm not sure why the BMs are going that way for you but one thing I would recommend is having more variety with your fat intake. Nuts, avacado, olive oil...rather than just coconut oil. Just a thought and I hope it helps.