Re: 2 pump sessions or 3?
Your baby is still really young, so I would strongly recommend sticking with 3 sessions. Periodically skipping the 3rd session probably isn't a big problem, but do it routinely and your supply will likely go down. It's possible that you could get away with it if you have a really high storage capacity, but that would be unusual.
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"