I am removing some wallpaper on walls that have wallpaper on the bottom half and had been painted an extra time on the top half after the wallpaper was up...I have 2 questions:
1. While removing the wallpaper that was put over a painted wall, some small areas of paint came up with the wallpaper. How do I fix that before putting on my new coat of paint?
2. How do I paint the entire wall now and not have the line or bump show between the bottom half where the wallpaper was removed and the top half that has an extra layer or 2 of paint.

 

Welcome to the forums!

Were you able to remove all of the wallpaper's adhesive? If not, it's a good idea to prime that entire area with either Zinnser's Gardz or an oil base primer. That will seal the adhesive preventing it from being an issue with the paint. The areas that the paint peeled - is it just paint? or did it also take some of the paper off of the drywall, exposing the gypsum? If so, those areas should also be primed with Gardz. Those areas would then be filled with either spackling or joint compound.

How prevalent is the transition between the top and bottom? Is there a texture on the wall?
The fix could be a simple as a light sanding or could involve coating the transition with joint compound and sanding smooth. You might also need to add texture so the repairs match the rest of the wall.

 

I think I've gotten most of the adhesive off....and the areas that peeled are just paint.
The transition is minor, but noticable and both top and bottom are not textured, but a fairly smooth finish.

 

I'd go ahead and either sand or apply j/c and sand to the transition and then prime it to see how it looks. If the repair looks too slick, you can thin j/c down to paint consistency and roll it on to mimic the roller stipple from multiple coats of paint.