There seem to be two types of bugs in this area...
Bug #1
The list is weird and incorrect. For example under most watched shows last month or last year I see this listing on my page...
Taken (26 eps)
Brooklyn Nine-Nine (8 eps)
Dead to Me (7 eps)
Jekyll and Hyde (4 eps)
The Mist (2 eps)
...which makes no sense since there are shows where I've watched over 100 episodes so this list is kinda incorrect.
Bug #2
Above list also doesn't seem to take all episodes into account. For example Brooklyn Nine-Nine, Dead to Me, and Jekyll and Hyde show incorrect (much lower) number of episodes than I have marked as watched.
So, one of the bugs may be tied to the recently fixed bug where rating something toggled "watched" status so it may have affected this. Not sure if it's iteratively added/removed from the counter of number of watched or if the page just checked database and counts it every time (if this is the case, it should get the right amount since more episodes are marked as watched).
Bug #3
Okay, just noticed that "Just watched" section doesn't show all episodes correctly which is why my "Past week" most watched list is also incorrect.
When I click on "View all watched episodes" link, I can see all of them correctly, but under Just Watched only 1 appears out of several I watched today. The reason seems to be that many have "Watched on: unknown" while some have exact date. Not sure why because I either click on "eye" to mark something as watched or rate the episode and watched status is automatically added. So there may be areas where you don't attach date when action is taken.
Cheers!

