Re: Spitting up during the day, not at night
Welcome to the forum!
My guess is that you're not doing anything wrong. Some babies are just spitters. The muscular sphincters which are responsible for keeping stomach contents in the stomach just aren't strong enough to do their job consistently. But time will take care of this problem. As baby gets bigger and stronger and his muscles develop, he'll stop spitting so much. And once he can sit up, the spitting will likely diminish greatly or even vanish.
The fact that your baby spits more during the day makes me wonder if some of this is positional. Do you nurse in different positions during the night than you do during the day?
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!"