I agree with marciemi - we will never know the answer to that until it is all over. Some MOCs (or the Admissions Office) give the primany nomination to the LOA person and others do not thinking WP will find the LOA person another slot. Some LOA winners who are not the primary MOC nominees get NWL slots.
My son had an LOA and a Presidential nomination. His offer was charged against one of the 100 Presidential slots but other Presidential nominated people were charged against one of the 100 minimum NWL slots. In short, the process has so many variables and "moving parts" that it does no good to try to figure out exactly what is happening.
Unfortunately, if you are not a MOC vacancy winner or top 100 Presidential nominee (or other category winner like Army, NG etc) all you can do is wait while Admissions matches the best people against the limited slots. By mid to late March the vast majority of people will know their status.