I watch some rerun of NCIS on the French TV, and they really like to air them in a total random order. Regularly (sometimes more than once on the same evening), I click on “Watched up to here” instead of “Check in” and that checks all the previous seasons or unwatched episodes…
Could you maybe add a short pop-up proposing to undo that, or maybe an option in the settings to hide that function would be amazing! So I don’t have to uncheck all the episodes manually. 
Keep up the good work, love the app!