The deal is that the image you see is not the image stored in memory. For sample sets with points larger than the pixels on your screen, LabVIEW will truncate/interpolate/labview magic the dataset to create an representation of your data for display. Setting your mouse to a specific data location will often result in a little movement to get to the closest point that is displayed. Workarounds include using a HUGE monitor or displaying fewer points at a time.
