You will even out. Milk is made on a supply and demand basis. Right now you're just regulating, plus Evan could have just went through a growth spurt, so that could also contribute to the little bit of extra milk.
Tip on leaking: When you start to feel you let down, press your forearms against your boobs really hard for a good 30 sec. or more. Do this for a while and you will train them not to leak