HEY ITS NOT THE PADS TRUST ME!
Squeaking can come from a lot of different things. First you should try using some EBC Brake Quiet or another brand of rubber brake dampener.
The pads squeak when you apply the pressure as they move around when slowing down they squeak. Its not the side that slows you down, its the back side of the brake pad that creates the squeak.
Brakes are one of those things that you have so many parts and so many things to do, rototrs, pads, calipers, bleeding the lines, making sure you install new copper washer, lube the guide pins etc.