Your dodge calculation is twice inaccurate :
* the dodge that is outsourced from base agility is not subject to DR()
* the base dodge isn't a flat 5%, it's 3.758% (for Warriors, as it's class-specific) plus whatever comes from base agility (for a level 85 Orc Warrior, that's 120 agility; it does change, albeit slightly, depending on race/class/level)
pre-DR() dodge : ~8.38% (as per armory profile). DR(dodge) : ~7.73%. Non-DR() dodge : ~4.04%. Grand total : 11.77%.