Yes, writers change the direction of a s/l all the time. Of course I'm hoping a few "rumoured" spoilers turn out to be true ;) :D . I'm sure one of the main purposes that spoilers are given out by the shows are just to keep people watching - but, unfortunately, there is never any guarantee that any given spoiler will happen!
BabygirlAh - I too am very disppointed that Scamber appears to be sticking around longer...I wish she would just leave for good - and take David Chow with her!! >(