The extractor, ball detent and spring are working as intended. The extractor slides back and forth in a keyway on the front of the bolt lug and is centered by the spring-loaded ball detent.
If the forward action screw is too long, you'll be able to see it with a flashlight when you look down into the receiver's bolt recess. Shorten it with a few strokes of a file.
Another possibility is a too long scope mount screw blocking the movement of the upper bolt lug.