Canonical Backlink incorrect – gives 404 error

Also, while looking at the actual rendered page content I noticed that there were 2 link rel=”canonical” entries, one is correct and is the one I set using Yoast and the other incorrectly leaves out the %category% and seems to be associated with the issue mentioned above. My current work-around is to modify the Custom Field pcst_canonical_permalink entry to correctly include the %category%. Lastly, in some of the syndicated posts there are multiple Custom field entries for pcst_canonical_permalink. They don’t seem to affect the actual rendered page source HTML.