Some things didn't make sense ..
I agree that the duke/dutchess/queen thing didn't make sense. The carriage with the rose brought a dutchess to the engagement party .. no mention of bringing a queen/king, or the three sons of the duke/dutchess .. also, for the wedding at the end, why didn't the King/Father of Rosella come? These movies seem to leave the daddies out ..
Other thing .. Queen Arianna? .. hmm .. her storyline made no sense. When she was a child, her family tried to poison the king and his family, so she and her family were put on a pig farm .. she grew up, and married the first King she could find, and old one with a heart condition .. who died 3 days after they wed. Hmmm. that story line wasn't all necessary, and didn't need to be so dark. ALSO, after he died? she heard that a son was born to the King, so she had a "daughter right away?" .. who would the father of that daughter; Princess Lucianna be???? Is she really a princess?
One last last thing, I promise; if there was a shipwreck, and a Princess lost, wouldn't that come to mind when Ro is brought back to the kingdom, wouldn't SOMEONE have remembered this ...
My daughter and I have watched this too many times .. I guess I am picking it apart
:)