It's difficult to tell from such low resolution shots, but it seems like your camera isn't focussing properly.
If it's new enough take it back and get a replacement. Otherwise it should go in for a calibration service - send your lens along and ask them to calibrate the lens and body together.
At the very least go back to the shop - take along your lens and CF card and ask them if you can test another XT. When you get home if the pics are OK then you know you have a camera problem.