Oh my lord, you're all frikken blind apparently. The graphics card is sagging... there is no misaligned motherboard, there is no extra slot on the case. Those are all artifacts created by the perspective. If you look at the entire picture rather than drawing lines on it (which is ridiculous in the first place, because the picture is tilted and therefore won't line up anyway) you'll see that there is a "slot" behind the card's cooler, (probably populated by a PCIE 1x, if anything at all) that makes the number of openings on the case match up. Furthermore, this proves that the card is sagging, because it's covering up that slot. The "backplate" starts to bend as soon as it comes out of the mount at the back of the case. From there, you can see that it sags down until the point at which the most weight is (eg, the center of the cooler) and then levels out again. The leveling out is due to the fact that nothing is pulling down on the back of the card, but rather the middle. Since nothing is holding up the back of the card, it remains straight. Whereas if there was something underneath the back of the card, you'd see it actually bend back upward.
You guys are making the mistake of looking at individual pieces of the picture, and comparing them to the border. This creates optical illusions because of the forced perspective. The picture is taken at an angle. It's skewed from side to side, top to bottom, AND front to back in 3D space.
The card is sagging people... There is no conspiracy here...