Cache is not at the posted coordinates but is nearby.
To solve for the final coordinates do the following math.
X = 1+3+5+7
Y = 2+4+6+8
Z = Y - X
Subtract Z from the posted North coordinates and add Z to the posted West cordinates to get the final coordinates.
Yvsg naq lbh fubhyq svaq n cvyy obggyr.