We're running into an issue printing our workbook. The sheets do not
print as 1 print job, rather they're broken into smaller jobs of 4-10
sheets each. This creates havoc with the page numbering (eg. Page X of
Y).

The interesting part is that it always breaks between the same
specific sheets each time, and the breaking occurs between logical
breaks in sections throughout the book. In other words we have
something like this:

Logical grouping of sheets called "North America"
Sheet1
Sheet2
Sheet3

Logical grouping of sheets called "South America"
Sheet4
Sheet5

When printing it breaks between those groups and sends each as a
seperate print job. We can't figure out where this is defined or
what's causing it. Any ideas? Thanks in advance!