Adding additional attachments to a post after publishing

Hello,

Currently, you can remove attachments from published postings, but you can’t add additional attachments or update the attachments. For example, if there is a new version of the document or supplementary documents that were created later, we either have to create an entirely new post or reply to the post with the new attachments. It's a little messy, and it would be helpful if they could be added to the original post later. 

Creating a new post pulls metrics away from the original post, making it a little messy to track, because now we have to look at both the old and new posts for metrics.