Thank you for your excellent work making logs for me.
I finally tracked down a bug in the listing paging code. Swift delivers listings in pages of 1,000 items. What was happening is that if the last item was a directory (in this case the encrypted "Ian Drury/") then rclone removed the
/ from the name. However that name without the slash was used to get the next listing page which caused the encrypted "Ian Drury/" to be returned again - hence the duplicate we've been seeing in the log. I'm pretty sure (but not 100% confident) that this will cause the "Ian Hunter" directory not to be skipped too.
Here is a new beta which has that bug fix - this should definitely fix the duplicates, and I'm hoping it will fix the missing too! Done in commit ce1b9a7d.
https://beta.rclone.org/v1.36-237-gce1b9a7d/ (uploaded in 15-30 mins)
Let me know how you get on
Note that this is a swift, hubic fix only so it doesn't fix @durval problems. However I'm pretty sure that @durval problems are caused by duplicate files on drive which the new beta will warn about.