Ramses's page

I have the Pathfinder Chronicles Campaign Setting book that was released in 2008 that gives spell lists for the Red Mantis Assassin all the way up to 5th level. The Inner Sea World Guide doesn't have the spell list for the RMA. It states that the RMA can only learn sorcerer/wizard spells from the from the schools of Transmutation And Illusion. The paragraph ends stating that they add two other spells @ each of the following levels 2nd,4th,6th, 8th, & 10th levels. Is there an errata pdf available?

I have three questions that I would like to have answered. Here are the questions. The rules given in chapter 10 of the PSOP are not very clear as to whether this is legal. I am asking this first question because in my opinion it would be no different than upgrading a +1 magical longsword to a +2 magical longsword.

1) Is it legal to upgrade a +1 magical weapon, armor, or a shield with an enhancement bonus (i.e. keen or fortification, light) using the rules given in chapter 10 of Pathfinder Society Organized Play?

2) What other types of magic items listed in chapter 15 of the Core Rule Book are available for purchase besides the magical weapons, armor, shields, potions, & scrolls.

3) I'm playing a monk character in the Pathfinder Society Organized Play. In all of the season 0 scenarios that I played up to this date, There has been a limited number of items that are of useable to the monk character class.