@ian_macfAs an author I can establish my story display settings as Alphabetical or Custom and then setting my own story list order and that becomes the site default for listing my stories. Otherwise the sequence you will usually see is the Chronological posting of the first chapter of the story, depending on how your accounting settings are set up.
I'm not sure if the free accounts have the option, but the Premier Accounts have an Account setting option for Display Preferences where you can choose between several options which include Alphabetical, Story Date, Story Size, etc.
Within a series I can establish an order by how I write the titles - see my Clan Amir and Chaos Calls series for that method, or I can set an order by the way I add them to the series story listing. This can be easily re-ordered by simply de-listing the stories then adding them back in according to the new order I want them in.