@Marcus205 I don't know if it will help, but you might want to fill in your profile info a bit. That might make hosts more open to having you stay. You do have one review and it is positive, but very brief. So hosts might be leery, as you look young (nothing wrong with that- I've had lots of great young guests, but some hosts are afraid or have had bad experiences with younger guests being partiers)
And, as Linda said, it always helps to send a nice, introductory message to the host. Airbnb's aren't hotels, people are welcoming you into their homes, which they've usually put a lot of effort into making nice for guests. So a personable message, stating why you're coming to the area, or whatever, can go a long way towards making a host feel comfortable with your booking.
It's also posible that it has nothing to do with this- you may have just been unlucky enough to hit on hosts who didn't have their act together as far as their booking calendar goes. But the following the above advise can't hurt, no matter what.