Definately believe that IanR trait should be -1 / -2 / -3 instead of the -10 / -20 / -30. Personal Security not only affects the ease that you can be assassinated, but also the size of your personal bodyguard. Each point is worth 2 bodyguards. This means at the second and third level of IanR you can actually end up with a negative number of bodyguards. Somehow I don't think thats what CA meant.