I bought a non-refundable fare yesterday and saw today that a different (later) flight was now $50 less than my original itinerary (price went down since yesterday).

I went to my first itinerary to see whether I was still within the 24-hour cancellation period, but it didn't say, so I went to check my email. When I checked the receive time on my email, it turned out that I was about 45 mins beyond 24 hours. I went and clicked to the next screen where it gave me the option to cancel with no fee, and I could choose between credit to my credit card or TravelBank credit. I thought this was weird as I am beyond the 24 hour cancellation period. I cancelled anyway and promptly rebooked with the new itinerary.

Now, when I go to manage flights, the old itinerary is marked as cancelled, and the new one doesn't show up. The confirmation email on the new itinerary sent to my email shows my TrueBlue number and says I'm confirmed, but it's still not showing up and it has been an hour already.

Did I break something, or does JetBlue have some sort of leeway on the 24-hour full refund policy? Also, seeing as how my new flight isn't shown on my account, could it be some sort of website bug?

No one here is going to be able to conclusively answer those questions for you. Call it in and get an agent to clear it up.

Well, the new itinerary finally showed up.

I was posting to see whether anyone had a similar experience to see whether JetBlue has an unpublished leeway for cancelling after 24 hours.