Check your relations in the sketch. If you click on the center point, it should have three coincident relations. The center points of the two Center Rectangles should be coincident to each other and to the origin of your part. It sounds like you don't have the rectangles centered on the origin.
Also try using the Right Click in space and then choosing Display/Delete Relations. At the top where the box with the down arrow is, click on the down arrow and then pick External. This will show you the relations that are external to the sketch itself. You probably won't have any.
To add a relation, exit out of the Display/Delete Relations with the Escape key and then control select the center point of a rectangle and then the origin of the part, then pick coincident in the Property Manager.