I cannot figure out why my black and red starting city tiles have no melee bonus but my blue and yellow tiles have a +1 to melee. Is it a printing error or supposed to be different. If it is an error, which tile is correct?

I think these are different on purpose. I think there might be a standard go first mechanic but I can't remember that. I'm sure there are optional rules for each house (found in the back of the book) that might counter balance these.