Where do these files come from?

Hi all,

been using the Creative Cloud Files for a number of years now to share files between different companies. Lately there is a problem I can't seem to solve. A few files keep re appearing in one of the shared folders. I have deleted them several times, both in finder as in the online envirement with the "delete permanently" option wich should get rid of the files for good. But every so many days they keep re appearing during synchronisation.

Is there a way to find out where these files come from? A log file maybe? Any other suggestions would be appreciated!