The commandment "All animals are equal" is not being followed in the first five chapters of the novel. One example is that Napoleon was treated better than all the other animals and constantly mistreated everyone. Another example is that the pigs relaxed and did nothing all day while the other animals had to work. The pigs were treated like royalty in comparison to the other animals.
Daisy did not take the bait, which were Gatsby's parties, so he uses Nick to get Daisy. Also, They met each other in college, Gatsby went off to war, and Daisy did not hear from him for 5 years.