in datetime dropdown Presentation properties we have an option editable settings, ther we can select the format for date like calender or dropdown.....when we select dropdown for date and will get option to show the number of years, i just gave 2 years..when am executing getting as expected for first time.if i select date on that drop down again it's behaving abnormally..for example if i select 2016 for first time(note we have gave only 2 years means it should show 2016 and 2017) it works perfectly..now second time  if i go to the drop down it is showing 2015 and 2016..if again i select 2015..it will showing 2014 and 2015.. years are decreasing when i select less year on that provided...same thing is happening when i selecting higher date also....please  help me on this..

Thanks,

Thappeta Raju