There is much to learn. First, you must put the requested dates in chronological order. Even if you want a later date, they don't schedule that far ahead so you are unlikely to get it early. They won't even look at an out of order date. they do not commit to schedule more than 45 days ahead.
Second, once you get a date and send in $95 to hold it, they will call you to explain that the package you have gotten is "economy" and you have three choices: upgrade, add time, or accept money $75 to cancel completely. So you get your $95 back and an additional $75.
Once you send in your three dates, they really only look at the first one. You are held in limbo until the first one is very close and then you will get a notice that it is or is not available. You then have to let them know if you want them to look for the next date. They really do not make it easy to take a trip.