Custom Command editor creates duplicate file

Hi,

I am experiencing quite strange problem with Webmin > Others > Custom Commands > Custom Editor creating duplicated files instead of overriding the existing one.

I have Advanced Policy Firewall (APF) installed on my CentOS 6.4 server. To make it easier for my users I have created File Editor for /etc/apf/deny_hosts.rules with the detailes shown in the attached screenshot. So every time I edit this file, the /etc/apf directory shows duplicate 'deny_hosts.rules' file like:

I wonder is this a problem of Webmin creating duplicate file instead of using the existing one or APF?

Anyway, if I try to delete the file it still shows one of the files:

root@ns1:/etc/apf# rm -rf deny_hosts.rules root@ns1:/etc/apf# ls -l total 112 -rw-r----- 1 root root 1010 Jan 24 22:02 allow_hosts.rules -rwxr-x--- 1 root root 6364 Dec 13 15:11 apf -rw-r----- 1 root root 19192 Dec 13 15:11 bt.rules -rw-r----- 1 root root 23159 Dec 16 14:37 conf.apf -rw-r--r-- 1 root root 13 May 30 00:23 deny_hosts.rules drw-r----- 2 root root 4096 Dec 13 15:11 doc -rw------- 1 root root 0 May 30 00:23 ds_hosts.rules -rw-r----- 1 root root 0 Dec 13 15:11 ecnshame_hosts.rules drw-r----- 3 root root 4096 Dec 13 15:11 extras -rwxr-x--- 1 root root 10723 Dec 13 15:11 firewall -rw------- 1 root root 0 May 30 00:30 glob_allow.rules -rw------- 1 root root 0 May 30 00:30 glob_deny.rules drw-r----- 2 root root 4096 May 30 00:30 internals -rw-r----- 1 root root 495 Dec 13 15:11 log.rules -rw-r----- 1 root root 164 Dec 13 15:11 main.rules -rw------- 1 root root 0 May 30 00:23 php_hosts.rules -rw-r----- 1 root root 172 Dec 13 15:11 postroute.rules -rw-r----- 1 root root 168 Dec 13 15:11 preroute.rules -rw------- 1 root root 0 May 30 00:23 sdrop_hosts.rules -rw-r----- 1 root root 3245 Dec 13 15:11 sysctl.rules -rw-r----- 1 root root 15 Dec 13 15:11 VERSION drw-r----- 2 root root 4096 Dec 13 15:11 vnet root@ns1:/etc/apf#

If I try to remove the file again, it simply doesn't delete, it is shown still there:

Strangely enough, 'cat' command shows there is no such file:

However, 'ls -l' command still shows it is there. And only if I use wildcard when deleting then the file doesn't show with 'ls -l':

I really lost any edge in understanding this issue and would appreciate any elaboration on this. Thanks!