The PDF Processing tab shows how many PDFs have been created and how many separations have been output from those pages.
The PDF Creation Total in the PDF Processing dashboard shows the total number of Created Total + Pages Replaced as indicated in the PDF Creation dashboard. For example, if there were 12 pages originally created, and all of them were Refined again with a different Process Template, the PDF Creation Total would show 12 (Created) + 12 (Replaced) = 24 pages.