This is not working, I am having the exact same trouble, no matter how i search the transaction will not come up to refund.  I have that exact same screen with the exact same wording IT IS NOT WORKING!  It will only pull up the last two transactions...the blurb on the right about waiting 5 days after a batch is bogus, nothing comes up 5 days after..  Why is this so hard to do, yet so easy to get payment but so hard to refund or void.  My options do not include void only refund....seems to be a whole lot of people with the same problem.