That's not supposed to happen, so I'm guessing you have some other (outdated NAM files) hidden somewhere; In fact, just installing the new NAM should wipe out any instances of the old NAM for you...
Thanks, I had to go and look through everything. I finally found that I must have accidentally combined it with another folder when I used Datpacker a long time ago. Now I just have to figure out what else I compressed into that file as well. That will teach me to pay better attention when I do things like that.