This is not normal.
4) Yes, they receive the dressing bonus as normal. The English rules contain some ambiguity regarding Richard III. When activated he LOSES 1 ambiance. When he is dressed this reduction no longer applies but the rules contradict this. Richard's actor card however clearly crosses out the loss of ambiance.
Thanks for posting this! I think this interpretation makes sense. Once costumed, Richard III no longer costs the player ambience when activated for his main ability of moving up on all three tracks.
5 a) We interpret Propero with the Queen as doubling the drawn cards to 6 but still only retaining 1. Some might say you can keep 2 but that seems too powerful .
Prospero doubles the effect of one costumed character. So this means Prospero can only work with actors, not the queen.