Apparently your SWAT found your smb.config file, or else it couldn't have created it.
The line "#from UNKNOWN (127.0.0.1)" only says that he couldn't find the hostname of your machine. SWAT accessed smb-conf from 127.0.0.1, which ought to resolve to localhost or something. Maybe SWAT only tries to resolve using DNS. In that case he won't find it unless you register a DNS name with your ISP.
This comment in smb.conf should be no problem, only a remark.