Mike Harris, a Netflix member, writes on his blog about an exchange he had with Netflix recently, in which he complained about them shipping his TV series discs out of order. This is a big problem when you get season two discs before season one, for example.
Netflix's reply is that they will consider his suggestion to ship series discs in order. Meanwhile, "we suggest adding one season at a time to avoid getting them out of order." Read the rest
P.S. Greencine fixes this problem by giving you the option to lock your queue, so that no matter how long a wait you have, you will get your discs in the specified order. This leaves you discless for a while.