think there is a misunderstanding… remember, ALL the simple press content appears on a standard wp page… so its up to the wp theme for that page to do the standard wp header and footer calls, not simple press…
all the forum content is displayed via the wp the_content filter, which is long after the page display has begun…
that said, I would probably bet that your wp theme is doing the header and footer stuff… but since ALL simple press content appears on a single page, jetpack stats would be incorrectly assuming that there is but a single page of stats to display… it assumes the page is static in content…
again, we actually display all forum content on that single wp page allocated to the forum… the appearance of multiple pages within the forum is just url rewrite black magic.. of course, its all fully supported within the wp api… but that single page content displayed is fully dynamic based on url rewrite data…
the stats program would be better served to look at the canonical url of the page rather than the absolute wp page url.. unfortunately, this is how too many plugins deal with forums, e-commerce and other plugins that dynamically display page content…