Monitoring the basic (non-falcon) cache overnight I've seen some large directories appear.
Could there be a loop somewhere?
here's the path to one of the cached files in one of those large directories
.../wfcache/compton.parish.hants.gov.uk_parish-council/governance-documents~e-documents~minutes~a.share-facebook~/a.share-facebook/a.share-google-plus-1/a.share-facebook/a.share-facebook/_wfcache.html
I'm going to add /parish-council/governance-documents to my exclusion list