Hey Katie,
Are you using a National Instruments DAQ board for your data? If so, the data is given a timestamp when it is read into the hardware. Using those timestamps, you could see when the data was actually collected. Why do you have to wait a second for data to begin collecting? There are multiple ways to affect the x-axis of a chart by right-clicking on the chart and going to properties. Is there an option under there that might help you out?
Brian B
Account Manager
National Instruments