A customer paid two invoices on a check in August.  When we make a deposit we always print AR-R and file it with the deposit to make sure it matches.   This is proof that deposited MATCHED on 8-11-2020.  But now when I print AR-R for 8-11-20  it no longer matches as one of the customers invoices is on there but the other is not.  
AR-R is now wrong as it is short a single invoice (#156511)  
AR-E is still correct as it shows both invoices being paid
GL-D-Cr is still correct as it shows payment for both invoices.
 
How could the data for this one paid invoice not show up in AR-R but show up everywhere else?
 
I actually discovered this when i go through a routine maintaince do at the end of the quarter.  I have never had this happen in the 23 years.  
It is not a big deal as it appears my GL is correct, but now i will always be Leary of AR-R -or until i figure out what we did.  
Thanks
Laura