Can Someone Explain How to Better Use Lowe's QSP Aka "Pro Desk"

[Joshua Kidwell]

Went to Lowe's on Friday and got a Quote from the Pro desk. Buy about 150SF of Tile With the QSP Price of 3.73each (13% Off). Go Again on Monday Some of my tile is on clearance 50% off so I Get all they have and use a 10%off coupon to get 60% off. Go there Today and all in stock tile is 15% off for labor day so I use another 10% coupon and get 25% off. 

90% of the people at my lowe's have no idea what their  "QSP" is. Would I have better luck with pricing if I go to a lowes in a major town? or is this a normal thing. Can Someone Explain How to Better Use Lowe's QSP so I get the best results. Because right now I'm haven better results just going Ordering normal.