I can understand your confusion regarding ingame SSAA settings these days. Some developers are not very "consistent" regarding their design choices and labeling IMO. But normally 200% SSAA is used to indicate a doubling of the pixel count in both the vertical and horizontal directions, i.e. 2x2 SSAA = 4xSSAA. This standard is followed in for example ArmA 3, Shadow of Morder, BF4 and many other titles with ingame SSAA options.