When using the Page Engagement dashboard under Marketing Analytics, I like to add a filter on to view data for select pages, for example /blog. 

However, when I add a filter for page path / URL that contains /blog, the overall visitors / page views updates accordingly, but the bounce rate and page views per session numbers don’t change at all - and are not an average of the pages included in the filter. 

How can I get the overall row for these metrics to update?

Thanks in advance for any tips or advice!