On the left-hand side, you can see that x = 0 and y = 0 but the object is shifted and It's not related to the grid (x-axis and y-axis). It's not in the center. The same issue happens with the z-axis. The object is way above the grid although z = 0 or even a negative value. I think I'm missing something but I don't know what it is.
So check this image please...
...by hitting a "T" key You could switch the left panel and by hitting the "N" key You could switch the right panel. As could be seen on TOP of the right panel, there are values for Location, Rotation and Scale and these are of your interest! Hope it helps buddy.
As @DuarteFarrajotaRamos mentioned in the comments, those values are delta values for translating object. You can access the co-ordinates of the object by selecting the object, pressing the N key and under transform tab, you could see the co-ordinates of your object. You can change them as per your need.