Well first- your pump output is great. Not 'only' three ounces. That's perfection. More is usually due to 'over supply' and is not normal. While its considered abound to stash more milk- it does come with some downers too.
Anywho- you are still new at this supply/demand thing so your breasts are still learning the cycle. Some breasts stop
Leaking sooner than others. I'd say another 8 weeks and you have a good chance of being mostly dry
BFing, CDing, all natural mama to three boys! Certified lactation Counselor