New NVG589 Install - Pair Bonding Question

Three weeks into a new Uverse installation and everything seems to be working just fine. I consistently get my 45/6 internet bandwidth purchased and the IPTV service kicks Comcr@p out of the game. I do, however, have a question about the pair bonding and how the sync rates and such reflect the cleanliness of the lines. I noticed that each pair have max rates above 50k, but the sync rates are lop sided, using 44k of one and 11k of the other. Again, my service is fine and stable, just wanted to see if someone could clear up the discrepancies between the two lines. Thanks!