custom css confusion

hi not sure how to explain this - but trying to use jetpack's "custom css" to just override a couple little things without going as far as a child theme... (tho, i will if that's the solution)... the theme appears to do something funny with the css... like regenerating a new version for certain pages? is that possible? eg. on some pages (viewing with inspect element) i see this as the css location http://www.mydomain.com/wp-content/themes/clean-journal/style.css?ver=07ce8cb52cf304a05504ef9b9c7b4dac whereas some pages do not use that.. the jetpack css does not seem to be included on blog/category pages, and using the "custom css" in the theme options doesn't work either for those... so 3/4 of my site has the font and sizes i want, and the news section and other POST related content (pages seem fine) do not. any ideas?