With respect to the scratch on the Norah Jones album, when played is the scratch audible? Vinyl inevitably has visible surface features that when played are usually inaudible.
Sometimes for one reason or another during pressing, packaging etc., at the pressing plant the surface becomes contaminated with foreign matter that may or may not be audible. The patch of noise you hear a 1/4 way into the first track of your Miles Davis album may be just the case. A close visual inspection under good light, preferably on the turntable noting the position of the tonearm when you heard the noise may only require physically removing the offending foreign matter. I gently use my pinky nail followed with a pass from the edge of my silicon roller to remove leftover debris from the scraping. This often achieves complete silence after such a procedure and such is the nature of vinyl, perfect yet flawed!

