Rich Text Editor - Formatting issues

We are using Rich Text plugin(Vuram) in our application and facing multiple issues some of them are

- Copy the data in specific format and paste that in the editor. This does not maintain the formatting but disturbs the copied formatting

- Generating some extra metadata within HTML tags causing failure in the document generation

- Nested list items is not maintained too

What are the options we have available to avoid such issues as the data formatting while copy paste or manual is prime requirement with the proper HTML generated by the plugin.