Andreas42

OP, the alternative perspective is that there were some people that learnt the obscure things as well as the core concepts.  There are only two ways for CFA to measure this.  One would be to hold 20 x 6hr exams for each level so that you can be comprehensively assessed on all material.  Or hold 1 exam that includes a random assortment of concepts.  The fact that a few obscure things show up allow the people that REALLY know 100% of the material to distinguish themselves from those that know, say 90% of it.
It is frustrating though…  I’ve been there and feel your pain.