Hey, so just to explain why that happened: the ionic npm module is the CLI which contains all of the commands you run in a terminal such as ionic start or ionic serve and ionic help for a full list of them.
The ionic-angular npm module is the framework itself which contains the components and UI you use to make your app.
Some more information on the differences can be found here: http://ionicframework.com/docs/v2/resources/using-npm/
If you have an existing project using beta.6, the changelog has some steps for upgrading to beta.7: https://github.com/driftyco/ionic/blob/2.0/CHANGELOG.md#angular-update-to-200-rc1
Hope that helps!