Hello! I encountered this problem with some users. At the same time, for me and for some people the folder is displayed normally (only one and without two). Can you tell me what could be the matter?
Are these normal folders? Or shared folders? Or group folders?
You started a topic in support category.
Unfortunately you ignored the template and a lot of information to help you is missing.
Please add all necessary information like Nextcloud version, webserver type and version, os version, related log file content.
Without additional information the community members cannot help you.
And interesting would be, how did you manage to do that (created all folders in one client, or created two folders one via webinterface one via client, or with the shared folders, …). If there is a bug, it is important that others can reproduce it.
If you add a person to the circles and pointwise to the shared folder, then the folders begin to double. Problem solved