I can't seem to get the reset button to work. I used a free button and it is doing the job, however, the search list does not return results when the you make a second selection from the dropdown. Difficult to explain but i will try my best...
First dropdown is static and the second dropdown is conditional based on the first dropdown selection. When you make a selection from the second dropdown, then go to change the selection of the first dropdown, it returns no results.
Here is a link to the page: Dropdown Issue
I don't see any reset button here.
But - your problem comes from our conditionals, you are hiding fields instead of disabling the. This means that while they are not visible, their value will still get posted with the form. Which is not a problem when values are empty, but when one selects a value and changes first select, second select from first choice will keep its value,e g.: this is a part of a faulty url, as you can see fg_diamonds is not removed from url as it should be.
neodiamond_family=RA+Diamonds&fg_diamonds=697+-+801L+ROUND&ra_diamonds=001+-+801+ROUND
