Maybe this URL brings some light on the subject.
As it says the jump to number 4 was to follow Lucas' way of numbering episodes.
The license he talks about i suppose belonged to Tecmo (who at the moment are thinking to something more "bouncy"
If you scroll down the page, you'll read about a photo in which he and Rob Wittttaker (as he writes it) are dressed after the characters of Rodland. If someone has that pic, please post it.