My daughter built a DVD cabinet from pine and used wood filler to fill in where she placed the screws. She used Minwax stainable wood filler in a small tube, and used Cabot stain. The stain colored the area with the filler considerably darker than the surrounding wood. The wood filler states on the front that it is stainable and paintable, but on the back states it is formulated for Minwax stains, both oil and water based. She is planning an additional unit and would like to avoid this problem, as she was unable to lighten the filled areas. Will she need to use Minwax stain? Or is there another reason for this problem? Thanks in advance for your help. Katrinka