Flashing and Uneven Coverage

I painted my walls using a Valspar prime+paint, and everything looked great... until I ruined the paint job by drilling a couple of holes in the wall that I didn't end up using. I had a professional painter doing the rest of my house, and he filled the holes, sanded down the area, and then sprayed orange peel texture over the area to make it match the texture of the rest of the wall. He told to wait until the orange peel spray-on dried, and then apply a light coat of the paint into the effected area using a brush. Then, once that dried, he told me to apply a second thicker coat. I had originally rolled the walls, and I don't know if the use of the brush for touch up ruined the finish, but the new patched spot looks a shade or two off from the original paint. I ended up adding numerous coats, hoping to match the color, but the area ended up just getting wider, but never became a match. After the 2nd coat with the brush, I tried using a mini roller over the area, but still, when it dried, the shading was off. I don't understand what the issue is. Since the paint has primer built in, shouldn't it match the surrounding color exactly? How can I fix this without repainting the entire wall? Also, if there is no other option other than to repaint the wall, wouldn't I still have an issue with consistency, since I'd be painting over both the original coat as well as the area that is a shade or two off? Again, since the paint has primer built in, I can't figure out why the coat isn't coming up even, but I am at an absolute loss at this point. Can anyone offer some advice?

Hi: I want to update my living room. The room has a stucco-like treatment on the walls and ceilings. One wall is made of a veneer brick. I do not have the time or the money to remove and replace the drywall and the remove the brick wall and replace with new drywall. The paint color was chosen in order to complement the colors in the brick wall. One photo shows what the stucco-like treatment looks like, another photo shows the color difference between the ceiling and the wall. And another photo shows the brick wall. One wall has a sliding glass door, windows, and neutral beige drapes. There is wood flooring. My question is- is there a treatment I can apply to the walls, both the stucco-like walls/ceilings and the brick wall, so that I can change the paint color in the room entirely? Can I do a slight sanding to the stucco, to leave the walls with some texture, but not as much as is there currently? Can I paint over the bricks and would it look nice? What color would you suggest for this room. The room adjacent to this one is the dining room, and it will be painted in a neutral robin's egg blue-green (blue arrow 5001-3c by Valspar). Your thoughts and ideas are appreciated.