Net Conversion recently changed its reporting practices to ensure that our partners (you!) always get the most accurate and reliable data. We now report page visits and offer clicks based on unique pageviews rather than sessions. The change was prompted by the discovery that Google tags the Session count only to the first page viewed in a session – i.e., the Landing Page.
If you need to report on this metric in the course of work, make sure to make the switch from sessions to unique pageviews, too. Otherwise, you are likely to significantly under-report your page visits! More at Analytics Edge