Why Can't I Reserve this?

First, I think unavailable may mean it is in someones "cart" and they have 15 minutes to complete the sale. I was having issues with reserve america for the past week. All kinds of hiccups. Was not opening site until 8:03 according to my cell phone. Also it would pop up an error page. Not good timing as there is a minute window in which to get some sites in Florida. After I got the error message this morning I realized the site was in my cart!!!!!! Awesome. Then another error message as the clock ran down. Finally cleared after about 5 minutes then the clock reset to 15 minutes to allow time to finish. Really ran me through my paces. But HOORAY! I got a site for two weeks! So be ready at 8 am because the sites go the first minute in many parks for peak seasons. And look at your basket(top right) to see if it went in. Also think about recreation.gov. There is a really nice full hookup camp at I think Salt Springs? in Ocala National Forest. Beware I think these have privatized and some have dropped the 6 month window favored by park service in favor of a year or more.