Critical bug for files with a tilde or a comma

By analyzing the contents of the tar.gz file I noticed some major discrepancies.
On linux it is frequent to have file names with a “~” or a “,v”
These files loose these signs. Have a look there:
on source :
-rw-r–r– 1 root root 11008 Apr 12 14:39 .htaccess
-rw-r–r– 1 root root 443 Mar 12 2013 .htaccess~
on backup:
-rw-r–r– 1 root root 443 Mar 12 2013 .htaccess

The actual .htaccess is lost and replaced with an old one.

same problem with these files:
catalog.cgi,v transformed in catalog.cgiv
.htaccess.~1~ transformed in .htaccess.1

Unless there is something I did not understand this backup software can’t be used as a restoration would be very different form the original.

Thanks for passing your vision of this situation. Jacques Siboni

https://wordpress.org/plugins/backwpup/