*Sigh*. You're holding the pen differently when you draw and when you click. You should choose an intermediate way to hold it every time. For example, when my pen is at an angle, the cursor goes exactly to where I aim for. If I click on the screen like that all the time, it works perfectly. However, when I am holding the pen straight, the cursor appears to be "off". Once again, hold the pen in the same orientation as when you calibrated the tablet or recalibrate with another orientation.