How to change a listing in Travelnet

Hi. Us Pinnacle (Delta Connection) parents now can search and list, and must prepay, for Delta flts. So I went through the procedure to list and pay for an BDL-MSP flt, and I am duly listed in Travelet (under the employee's account,my son). But I find now the loads on an earlier flt much better. Anyone know how to change? I bring up our reservations, 2 people, check them both and click "change listing". The listing comes up, w. flt # etc, and a "Cancel" link on the right, as well as an "add more flights" button. What should I do?
Thanks!

You click on the cancel for the segments you no longer want and then add flights for the new segments that you do want and then confirm the changes at the bottom......

Thanks, that worked. I was afraid that by doing "cancel" I would initiate a refund process for the amount I paid, and it didn't make much sense to do that just to change flts on the same interary. Internally, the system must have done a refund-recharge, since the final message was the puzzling "Your Standby Listing Refund was successful". But I guess all is well, since my listing show up correctly and paid for.
Thanks again!

I am always scared to death that I may make a mistake with a buddy pass and render it unusable. I just changed one that was issued last year, so if I screw it up, I can get a refund but can only replace w/this year's pass allotment.
Like they say, read the changes 3 times before hitting that confirmation button.
Glad you had help--have a great trip