What you saw was an early test on how the missions work. Each mission could only be done a certain number of times, or depended on your experience level. There is no limit to how many missions could be added.
The hooker u saw is not part of the game, in fact none of the graphix u saw would ever be used in the game. Like I said I was asked to code it all and I never had anyone to do graphix, and I didnt feel like making any myself, therefore models & maps in the alpha versions of coarse are only used in the testing phase.
testing phase sounds cool
/me shakes his head at OL ... worst beta tester evr