This is probably to be classified as a noob question. 

I got my hands on " Bloodstained Wristguards". It has a  "+13 Critical melee hit rating".

A couple of questions.
What does thet +13 mean? i look at my char sheet and no change seems to occur. I still have a 9.1 % increase in melee crit hit bonus, found under dexterity, no matter if I equip or no. No change under attack either. Am I missing the place to look?

When i look in the wikis this item is listed as having a "+13 critical melee hit chance" instead of rating. Is this just  a typo or is something changed so my item is now bugged?

/Holo

This is from Graffe's, and while it is Titled Spell, it applies the same way to Melee for these 3 categories. Not sure what the numbers are on Avoidance/Evasion etc.

http://www.graffe.com/forums/showthread.php?t=49852