Q: Why Are There So Many Different Kinds Of Discordians?

A:  Discordianism is the open-source religion, in that most people who adopt it and use it seriously bring their own flavour and new ideas to it, improving it and making it their own.  One person's personality is starkly realistic and practical, so his version mirrors that.  Another's worldview is closer to the original recipe by Thornley.  Cosmic poetic absurdism with a dash of mysticism.

Other Discordian practices incorporate a fundamentalistic view of Eris as an unkind goddess of disruption and strife, a doctrine which finds favor quite naturally among the ranks of trolls.  Some people (myself) take Discordianism as a foil for a Vonnegut-esque worldview.  

(Answer was written by Felix, here)