Cover interacting oddly with Fester

[Cynric]

Tooltip say

Take all damage intended for another party member. Only active when member is closer than 10 yalms.
Oath Gauge Cost: 20
Depletes Oath Gauge by 20 periodically while active.

http://na.finalfantasyxiv.com/jobguide/paladin/#pvp

Yeah I read it. So why do certain moves not get blocked then ? And nevermind on the magical part I was misinformed by someone.

I thought the bug where Midare was magical damage was in this patch, but it was fixed this patch. So why does it hit through cover? Is the skill just that buggy?

also edited my first post, don't wanna confuse anyone