I've run the standalone gwcheck a few times now. with 'contents+attachment file check' and Fix problems.

I've run it on user/message.

It seems to me that it keeps reporting the same message after every run, I get

Correctable conditions encountered:
CODE DESCRIPTON COUNT
93 Unused blob files (deleted)..................583

It keeps reporting the same count, 583 files.

It also reports
Uncorrectable conditions encountered:
CODE DESCRIPTON COUNT
50 Unused blob files (deleted)..................18

Any idea on how to correct it?