Thanks for taking the time to report the problem you’re having. First off, I need a bit more information! Which version of SPARK are you using? Are you able to screenshot or list the values you have in the configuration options for the Date Picker control? What other variables/scripts/controls do you have interacting with the Date Picker? If you create a new coach and have the Date Picker alone on the coach, do you notice the same erratic behavior?
Let us know and we’ll address your issue as soon as possible.