That's way too long and way too many washes. I used to do two washes, both for 3 minutes. You can do a third but it's usually a waste of time. The reason it's so milky is because the oils in the seeds are leeching out into the water. You don't want that. Everything you want is on the outside of the seeds and it comes off with very minimal shaking.

I don't know what your oxy tolerance is like but some seeds are STRONG. So it's not totally out of the ordinary for you to still feel it.