I also found the same thing.When I posted the in javaranch I had gone through only 1st one,which looked like a cake walk.even 2nd was pretty easy,
Third I just started did not continue due to time constraints,but yes it was getting tougher.
Have you purchased whizlabs,if yes we can discuss about that too.
I am done reading the 2 books-distilled UML and applying UML patterns,these days going through the mocks,plan to give the exam in 2 weeks,as I am a working mom and do not get much time to study.
Good luck with your preparation.