Dither Problem

I do realize that but I have found nowhere in Wavelab 9 to set the resolution of the MP3 file even when it is dithered to 44.1 16 bit, the resulting file will be 44.1 but 32 bit. I can change the resolution to 16bit and save it, but when I play the file, my bit meter still shows 24 bits…I should not have to dither a second time