A family of Microsoft word processing software products for creating web, email, and print documents.
It certainly sounds as if you are attempting to save AutoText.
Again, this should be saved in a separate global template, not the normal template for sharing. You can pick your gallery (you have picked QuickParts for some reason), you can and should assign a unique meaningful name to the entry. You can assign a category.
In the screenshot above you can see that you can choose to save your entry in any loaded global template, not just normal.dotm.
As John said, if your styles are different in the document from which you are saving the entry, the formatting will be different when it is inserted. This is by design and is good. It is how Styles are supposed to work with particular formatting being uniform in a document for text fulfilling a given purpose. If you want peculiar formatting, do not format your original text in any of the built-in styles but rather in a custom style. (I do not recommend this; I predict it will cause you problems, but it is the ornly way I would use preserve formatting of text. (A part of this is that I only use Styles for formatting of templates.)
Recommended reading:
Automated Boilerplate Using Microsoft Word
Understanding Styles in Microsoft Word