@Janet500 First of all, you shouldn't include your email address in your post- that's a security risk for you. People can answer you here in the thread, or in the private message function here.
I know it isn't fair, but guests are always refunded unstayed nights if they cancel, unless it's a long-term booking. Yes, it's absurd that people don't pay attention to what they are booking and could book a cabin on a mountain and then expect it to be just as easy to access as an apartment on a city street. People can be bizarre and many just refuse to take responsibility for their own inattention and baseless assumptions.
This is where communication with guests when they first book or request to book is so important, especially if we have listings which may be a bit unique. I'd suggest in the future that you ensure, through messaging with the guests, that they have thoroughly read all the listing info and are cognizant of what they are booking. This is the time to make sure they have entered the correct number of guests, have read and agree to the house rules, etc.
To tag another poster- hit the @sign, then a box will come up with names of other posters in the thread. Click on the one you want and their "tag" will appear in the box you are writing in. Only five names ever appear in that first tagging box, so if the poster you are looking to respond to isn't there, just start slowly typing their name and number after the @ you've entered and their name will come up. Then click on it.
The "levels" here are just a social media thing that correspond to how active you are posting here on the forum and how many thumbs up your posts get. It has nothing to do with anything else, like hosting experience or expertise, or whether someone has Superhost status or not.
And don't belittle yourself- I wouldn't have known 90% of what I now know about Airbnb if I only relied on my own hosting experience in my one home-share listing. Most of what I've learned comes from reading posts from other hosts here and benefiting from the experiences of all.
So asking for advice and having empathetic ears to vent to (no, we aren't bored by your experience) are what makes this forum so valuable.