The first one seems to be focused on the near shoulder, leaving her face out of focus. The EXIF data recorded in the picture says your lens was at 17mm f5 1/50s ISO250, that Canon 17-85mm lens can't focus closer than 35cm, but if you really were that close your depth of field would only be about 8cm. To get a depth of field of about 50cm (i.e. just enough to have her near shoulder and face in focus), you'd need to be about a 80cm from her and focusing just past her shoulder, but not as far past as her face. You can't do that easily in auto-focus mode as there's nothing there to point the camera at. It's generally much easier to shoot a little further away and just focus on either the shoulder or face. You can do these kind of calculations at http://dofmaster.com/dofjs.html
, though the calculator there makes a few assumptions it's a good start.
BUT, you didn't need to be shooting at 1/50s. At 17mm, the rule of thumb is that a shutter speed of 1/17s should be sharp enough if the subject's not moving appreciably. And you have IS, so you can go even slower than that. What use is that? It means you can afford to use a smaller aperture, like f8 or f11, which will provide you much more depth of field. You may want to reduce the ISO to 100 or 200 too... 250 is not a "100 * power-of-2" mode, and I've read the camera will actually use ISO400 and then adjust recorded exposures. Higher ISO values have more grain.
Re #2: I agree the missing feet is a bit weird, but I think it's a very cool pose... lots of energy and attitude.
Cheers, Tony