Is oversupply a problem? Also hind milk question

chronoptomist

We're at 10 days pp and I'm pumping about 2-3x/day on top of nursing.  I basically just pump when I still have plenty left after he's done.  I'm already getting 3-5oz per session.  I'm going to go back to work ft at 6 weeks so I'll be doing plenty of pumping then.  I'd like to be able to have a decent stash in case there are ever issues, if I need to stop sooner than I wanted to, whatever.  Also, I'm digging the weight loss.  At 10 days pp, I've lost 28 of my 30 lbs I put on.  I still have 30 I want to lose that I was up before I got pg. 

Are there any reasons I don't want to keep up like this?  

 Also, what about hind milk when pumping like this?  Sometimes he doesn't even finish one breast.   I know he's eating plenty due to his awesome growth, but he's not always getting the hind milk.  Should I pump a little first so he gets that hind milk?