For a little more than a week, my emails no longer mark as "read" even after I read them. I have to manually go to the "mark as read" tool for each email. I do NOT have "sort by unread" turned on. I sort my emails by date. The version of mail I'm using is version:7.8.4-2.0.0-9.
Thanks for any advice. The new Xfinity email is terrible as far as I'm concerned -- this is just the latest weird glitch. (Like, could you PLEASE fix the misspelling in "Adress group"??)