Form Sends Dates Even When Not Selected

I have created a contact form with 10 date fields for users to choose promotion dates.

If only one date is selected, the remaining dates are passed as the current date. Not really a major problem because I can possibly assume that the string of current dates are dates that weren't selected. But, it would still be nice to have blank dates.

See attachment.

dates.PNG

You can add the pages.pre.php controller in the My changes module, compare data in request with current data and clear necessary values