FYI we've implemented a few server side fixes that should start allowing players to log in easier and not be kicked out. We're going to continue working on this until everything is running smoothly.
Also, for those that created a Guild but were kicked out, go ahead and create a new Guild (should be able to now without any issues) and make it similar to what you wanted it to be, such as adding a 1 or number to the end. After doing this please write in a support ticket so that we can track this and attempt to get you the original name you wanted for your Guild.