Shortened URL doesn't work if is is being cut/pasted into the post or the post is duplicated, and then used from drafts with the same link.
The posts discussed do not have a campaign tracking code added to the links in the posts. It looks like the post authors are shortening the link URLs outside of Adobe Social and pasting it into the text. Instead, they should paste the full URL in the text and then have Adobe Social shorten it.
In summary, campaign tracking does not exist for these posts because there was no Social campaign tracking code involved.