These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Leave The Plot Threads Hanging: At the end of the film, Lady St. Edmund raises the possibility that maybe Casey actually is the long-lost Margaret. The movie ends on that note, but the details we're given about Margaret's disappearance and Casey's background make this ambiguously possible.
Although extremely unlikely, as Margaret had an allergic reaction to strawberries, which Casey had no problem eating.