You have reported 2x18 through 2x39 as incorrect. Please explain more. I’m going to hide your other reports, one report per season will suffice, so the section doesn’t get flooded with reports.

Previous contributors had populated the episode lists with information from the American (1998) version of the show, in error.

My edits across all 10 seasons today have corrected all of the errors.

Source: https://en.wikipedia.org/wiki/List_of_Whose_Line_Is_It_Anyway%3F_%28British_TV_series%29_episodes