For all examples below, I am referring to the Bestiary.
On Page 74, the Demonling gets Resistant (+1/2) for 2PD/ED at a cost of 2 points. Assuming this is a naked buy, it makes sense. 2 PD/ED would cost 4, a +1/2 brings it to 6, since its naked, subtract the original four, get two.
On page 161, Giant Spider also gets Resistant for 2PD/ED, but it is at a cost of 6 points, not 2. This cost does not make sense unless it is a non-naked purchase. But if so, should the description say +2PD/ED, not 2PD/ED??
On page 31 for the Undead template, Undead body gets +2PD but at a cost of 6 Active points before applying the -1/2 limitation to it. Why do these cost 3 points each instead of 1 each?
On page 287, the base 2PD/ED for the monster cost a total of 6 points. Why six? I thought the first two points were free? Even if you're buying from zero, this comes out to 1.5 CP for each point of PD/ED.
Also on page 287, buying naked resistance for 6PD/2ED costs 12 points. Using the same calculation that we did from Demonling, this should cost only four. The only way this calculation makes sense is if you are buying them at 3 points each, but if this is correct, we go back to the question of why didn't these cost 3 points for either the Demonling or the Spider? Generally speaking, the PD/ED costs for all undead creatures seem messed up. (i.e. Zombie and Mummy also have inconsistencies.)
Page 447 has a similar issue as 74/161. The first entry for Armored Body shows a cost of 12 points for 4PD/ED, but this only make sense if it is a +4PD/ED. The second entry for Armored body shows a +8PD/ED with +1/2 Resistance and -1 Activation roll. The computed cost appears to calculate correctly, so why is there + sign on the second entry and not the first?
(Note: I'm not trying to be a semantics nazi here, but I'm the GM in a group of four where all of us a new to the system. It's really difficult to learn how the system works when the examples in the book lack consistency.)