Thanks Ray - also needed to make WADADeleteRecordName unique for each as well, but its working now.
One last little thing - the cancel button on in the pop up works for the delete element, but is giving an error when I cancel the delete day from the pop up.
Its not a deal breaker, as its fine with a link back to the page instead, but if you can spot anything obvious it probably would be better to just close the pop up rather than reload the page.