Just to play devil's advocate here...if the booking was for a longish stay and there's a big difference between the winter and summer rates (there's a huge difference in mine, for example), I can understand why the host is panicking. I have a mortgage on my property and during the winter, I am extremely lucky if I am able to cover it. I definitely don't cover the hydro and wifi, etc. Those are out-of-pocket. It's the summer months that help me cover my expenses and generate a bit of extra income. If this host has a mortgage, and if she really didn't understand the pricing, my tendency is to feel a bit of sympathy here. It's hard to get things right in the first few months.
I also noticed that when my listing was new, guests would often get the weekly rate even if they weren't staying the entire week. I did wonder if Airbnb was doing that in order to generate more business and more reviews for me. It happened a number of times and I had to re-jig my pricing an awful lot. I would look at a five day booking and wonder why on earth it was about a third less than I was expecting, given my nightly price.
I also remember adding one night to an eight night stay and instead of getting the nightly rate of $99, I got around 30! I couldn't figure it out...the math really didn't seem right to me, but in the first year, I had a lot of those moments...like, how did this number turn up when I expecting something else?
I would try to reach a compromise with her. She may just be panicking.