My neighbour had squealing pads on his XT the other week, and he likes to use his brakes as he minces along. I was unfortunately stuck behind him on a 2 mile section of singletrack – my ears were ringing by the end of the run !
Anyway he replaced them with some after market pads and all was fine.
Suck it up. If in doubt re-align everything again, take a bit od sandpaper to the pads and try again. Certainly doesn't warrant replacement in my eyes.
Think he replaced the sintered with organic as well.