[css-break] Nested fragmentainers and break types

I am confused by section 2.2. Given a page fragmentainer context which
contains a multi-column fragmentainer context, if there is a page break in
the content it sounds like there is only a page break, not a column break
since the type of break that was created by the page context was a page
break. But the example directly contradicts this, saying in this case there
is both a page and column break. Am I misreading the way the break type is
calculated, or is the example explicitly calling out an exception to the
rule?