I recently remodeled a bedroom and installed new drywall. We painted the walls and ceiling with flat paint (since this is in the master bedroom and it is supposed to "hide" imprefections better than glossy finishes). But then we had a few "screw pops" in the ceiling where the drywall screws starting coming out (either due to the wood supporting the drywall drying or poor installation on my part to begin with). I decided to fix the screws by adding new screws to hold the drywall up against the joists and either removed the old screws or screwed them deeper into the drywall. Then I patched the holes and repainted.
I figured since I was using the same paint and we had put the initial coat on a month earlier the pathes would be invisible. The color is a perfect match (it is the same paint after all) but the "finish" is all wrong. In artificial light or when looking at it on an angle you can still clearly see the patches. Is there anything I can do to get this finish to match? Is this all happening because my paint is the try "flat enamel" and not an eggshell or semi-gloss?
The initial coat on the walls (before the repair) was done with a roller while the paint over the patches was done with a brush. However I don't think that made a difference because there are not brush strokes visible and the difference is not where the new paint is (a larger area than the patches) but it just the patched/sanded area.