There has always been spare camping capacity (at least, up to and including this year), so you SHOULD get a letter allocating you something. For the last few years, BSJ has never been full, and if you are a first-timer ordering, this is probably what you will get - you didn't say what you had requested.
There is no apparent limit on general entry tickets, so you will always get these.
Keep your eye on this forum, and people will post when they get their allocation letters. If you don't get one then, that is the time to contact the ACO to find out what is happening to your order.
Del