Most likely your walls need another coat of the burnt sienna color. This color is a little difficult to use, it doesn't cover well.
You didn't mention the type of paint you used or if your walls have a texture. Smooth walls will show vertical lines/bands if they are rolled in a up-down motion. They must be "back rolled" in a down pattern. Quickly roll a section then go over it again with a dry roller, rolling from top to bottom in a downward pattern. This will minimize roller marks on a smooth wall.