I learned that if I had stepped into the chosen hotel, my rate would be $22 cheaper than booking through Trivago. Now I find that Trivago booked me not only for last night in Tennessee but has also booked me for three days from now in New Mexico via Priceline! There is absolutely no way to get hold of Trivago and get it made right. Priceline says "Too bad, so sad" and hotel refers everything back to 'the third carrier'. The minor convenience now seems not worth the costs.