Per the guide on using Vuescan to create RAW DNG files, I recommend scanning in “image” mode in Vuescan rather than in “color negative” mode (which is the mode you are referring to). Vuescan isn’t consistent in the way that it applies color multipliers, and most times you will have better results if you make RAW DNG scan in image mode, and then white-balance & convert using Negative Lab Pro. This is what the calibrated profiles and Negative Lab Pro are expecting when it comes to a RAW DNG file.
-Nate