Try turning off your image stabilization (if your camera has a setting for that). It sounds to me like your camera's stabilizer function is not working properly. On a full size DSLR, when you push the shutter button half way, you should see the image stabilize somewhat. By the way, they tell you to turn stabilization off if you are going to use the camera on a tripod or flat surface. If you don't that makes the image jump around as you describe, when the camera is mounted on a tripod. Check your user manual and see what it says about the stabilizer function.
