The pricing looks to to be based on the CRP, but I really like your suggested pricing alteration. Actually going off the CRP, wouldn't Random Events, Magic Mem, Heroic Feats be 1 pt each, and Misc May 4 pts?
I read that sentence you quoted as a typo as well. But I thought they simply mentioned the wrong deck name (as Miscellaneous Mayhem used to be the Random Event deck).