I’m trying to understand the issues here. Running /watched/shows returned the correct results for your account (for season 1, you have 12 plays, for season 2 you have none).
On show 280856 you seem to have no activity. Are you checking in correctly with the correct API request? i.e. POST to /sync/history? Do you get a successful status code?
sorry for the confusion for 10494 picture I showed not due top api issue, but due to ui show 0 eps progress , see on the middle right side of true blood picture
What you see in the UI is not watched but rather a mark as watched button. Hover over it, it’s gonna show a tooltip. A watched episode has a grey tick in the lower-middle part of poster.