
There are a couple of things you can do about this. The “Important” label is assigned to a message by Google, based on Google’s adaptive understanding of your interests and priorities. Having lots of unimportant e-mails labeled “Important” can be annoying. You would normally be the one charged with assigning these labels but it sounds as if Google takes it upon itself to try and tag important messages based on some algorithm. Gmail groups everything based on labels and I suspect if you're seeing the same message in multiple "folders", it's because it has more than one Gmail label assigned to it. I'm pretty sure that like all things Gmail, no actual folders are involved. The information pasted comes from this website: Be aware that this information is from a sighted perspective so I have no clue whether the settings referenced are accessible.

At the bottom of the page, click Save Changes.Following my signature is the text from a page which discusses the Google Important folder and how to re-train its intelligence or how to unsubscribe from it. In the “Importance markers” section, select No markers. Hide importance markers in Gmail Using a browser, open Gmail. How do I stop emails from going to important? You can remove the Importance Markers in Gmail as well. Set this option from “Show markers” to “No markers”. Near the bottom, you’ll find an option for “Important markers”. You can disable this label as well by going to your Gmail settings as indicated above and then select the Inbox tab. How do I get rid of the important folder in Gmail? If you no longer wish to view messages with the Important label, you can either re-train Google or hide the folder. The “Important” label is assigned by Google, based on Google’s adaptive understanding of your interests and priorities.
