Hey @lccrew ,
Yes, any styling changes you make to the Heading01 element is reflecting on other Heading01 elements because they probably have the same class name (i.e. Heading01). It’s setup this way to save us from setting up things again and again for all elements where we want the same styling to apply.
In case, you want to edit a particular instance of heading01 and not the others, you can try out creating combo classes if it suits for your design requirement. That way, the base styling that you need for all headings is the same with some differences that you will introduce with the newly added combo class only for that particular heading element. Hope this gives you some idea.