Don't ever use the word error in the conversation. Once you call it an error rate or fare, you've lost.
Also, there are totally hotels where you get swings like that. I'm switching hotels midway through a trip in SF because the 1st hotel goes for $180 to 400 for reasons that probably make sense to the hotel. I've also booked hotels at low rates that go up quite a bit, likely because they ran their weekly/monthly numbers and decided they had a lot of bookings already and could charge more.