Seems that using Atlassian Confluence® can be dangerous. You can fall into dissociative identity disorder illness! :>
This is as funny as it can be, when you are only looking at this. But, when you try to edit any document (that Confluence claims, you're editing as two separate user) then it turns into a serious bug in Confluence.
Because each your type will be multiplied endlessly...
...with no way to stop this multiplication, except for refreshing the whole page, effectively loosing all unsaved changes.