When submitting a post to your community, you provide a URL and any helpful information for your community managers so they can categorize and approve your post. Much of the content is imported from the original link, but there may be additional description or other information added to the post by a community manager.
If you see typographic or other kinds of errors in the post once it is approved, you will need to reach out to your community managers to have them edit it. Members cannot edit or change posts once they have been submitted and/or approved by a community manager.