Pay (8 Dec journal - edited)

It is a good thing I had already done all the research on what to expect for my final paycheck.  The AF told me that the last check would take a while as they audited the final pay and made sure I did not have any leave debt, etc.  I was pretty sure that would work out fine and it did - I got paid exactly what I was expecting on the 4th versus the 1st.  Fortunately, that part of the system worked, because the advice of payment that I got from DFAS was completely worthless as it showed a net of 0.  It was posted 3 days after I already got the final pay.  Are they telling me they did not need to make any adjustments?  If so, then I expect to eventually get an updated LES, but why not at the same time?  If the calculations were good enough to pay me from, why aren't they good enough to generate some sort of usable paperwork?