Is it machine pieced or hand pieced? If it is machine pieced I would measure the 2 blocks you are thinking of moving. Are they exactly the same size? If they are exact and they are driving you crazy, then they should be fairly easy to pick out the stitching around the blocks and carefully pin and stitch them back in. If they aren't driving you crazy, I would leave them because it is pretty the way it is. If they are hand sewn, I would leave them the way they are.