Actress Holly McCall's character is listed in the film's credits as "The Noisy Maid of the Bride". Since this turns out to be incorrect, the producers attempted to fix the problem by tacking on a second McCall cast credit with the character now being "The Noisy Maid and The Bride". This is the correct ID. The remaining mistake is that the original listing wasn't removed leaving two McCall cast credits.
Actress Serena does not play "The Maid's Mother" as indicated in the movie's credits. In reality, she plays Kenneth's wife Elizabeth, the maid's employer.
Actress Jane Lindsay is credited as only playing "The Innocent Sister". In fact, she also plays "Anne Marie the maid" later on in the film (not to be confused with "Annie the maid" played by Holly McCall).