I had duplicate invoices.  One was voided because I forgot the sales tax and then I fixed it and used the same invoice number as the one i had voided...Some how the one was closed/ paid off but it doesnt show up on a report our AR guy does.  It seems it was voided and then when I tried to use the same number of the invoice it didnt show up?  Does that make sense? 

Can anyone help?  Should I never use duplicate invoices if i just void one and then fix it and replace it?  Its the same exact order just with some things fixed on it.....!?