It annoys me a bit too. This morning in psychology I was trying to find some revision quizzes etc. on the internet, but a lot of revision websites seem to have not put any of the new stuff on or are still in the process of putting it on. There are several topics in the new syllabus that weren't in the last one and vice versa.
As has already been mentioned, the teachers always seem uncertain about exactly what to teach us! Quite annoying that it's the third year in a row that we've confused teachers, no real past papers etc.