http://www.ioftpd.com/kb/view.php?kbid=70
ioBanana doesn't change anything in transferred files/releases. It doesn't and will never add/edit comments in sfv files nor add files (in zips or anywhere else) or create/edit m3u files or anything else like that.
What's the point of crc checking if you can't know what files are good and what files are bad ?