Problem with the Ionic versions

Ionic does not respect the default structure of the initial design according to the installed versions, I have version 2.0.0-beta.30, node = 6.2.1 and npm 3.9.3, when creating a project it generates the project with the structure of version 2.2.1, so it is very difficult to follow some tutorial, nothing works right, does anyone have a solution to solve it?