Also, it seems that the original poster has both UA and US instead of pooling them together.
I have UA (which has received miles from AC, LH, and US as well as UA), AS (which has received miles from NW, DL, and CO as well as AS), WN, and B6.
Similar to my situation. AS (AS, DL, NW, AA), UA (UA, US, LH, AC) DL (CO have some orphan miles on DL, plus I rarely step onto a CO flight).