OK....
I have figured out how to submit one form field to two different columns;
Open the insert record behaviour and then choose the dynamic value as the same form field.
<?php echo ((isset($_POST["title"]))?$_POST["title"]:""); ?>
Then to remove special characters, make lowercase and replace spaces with hyphens, I changed the lightening bolt value to look like the following
<?php echo (preg_replace('/[^A-Za-z0-9-]+/', '-', str_replace( "'", '', preg_replace( '/[«»""!?,.!@£$%^&*{};:()]+/', '', strtolower((isset($_POST['title']))?$_POST['title']:""))))); ?>
I'm not sure if this is the most efficient way, and I'm willing to be told, but it works!