IPC recommends a grid of something like 0.5mm for placement, which I expect is to facilitate old PnP machines with poor control and tolerance, or whatever. That always seemed rather blocky to me, but it seems to my OCD, it's far harder to align anything on a grid finer than 0.25 to 0.1mm.
Corner of the pad is a bizarre choice of reference, that seems to have no relation to the part, semantically or geometrically. Traditional (also IPC recommended) centers are either center of pin 1, or part centroid (which is also the geometric center, so it looks good too).
Also BTW, it looks like you are placing silk almost right on top of a pad. Most board houses will remove this completely, after subtracting both soldermask expansion and silk position tolerances from the desired pad aperture. If you draw a full box type outline around the footprint, the silk edge should be at least 0.2mm from the copper edge.
Tim