Ray you realise you can't always blame the artist, the artist has to create what the client wants. It would be inconsistent to have the original emperor for instance in that painting. Leia doesn't really do much in the original (besides ensure the plans get to the rebels) so it's not surprising he uses a more active Leia from Empire in the SW side. It is intended to split into three of course which is why there are 3 areas for movie names, but it's also intended to be a one piece artwork.