I'm running one ream of 2-part carbonless forms. Each set of two part will have two forms on it. Therefore I need the numbering to go like this:
4101, 4102, 4101, 4102, 4103, 4104, 4103, 4104
That way, when I do multiple pages per sheet from the PDF, pages 1 and 2 will have the same numbers, 3 and 4 will have the same numbers, etc. so the carbon copy will be the same invoice number as the one on the white copy ahead of it.
I hope this explains it better.