It's not possible, and this has nothing to do with cPanel, this is Linux itself.
The chances are, your file has a space at the end or something, so it looks like the same file, but it isn't:
$ ll file1*
-rw-rw-r-- 1 jay jay 0 Apr 19 11:07 file1
-rw-rw-r-- 1 jay jay 0 Apr 19 11:07 file1
$ stat file1*
File: `file1'
Size: 0 Blocks: 0 IO Block: 4096 regular empty file
Device: 802h/2050d Inode: 42008755 Links: 1
Access: (0664/-rw-rw-r--) Uid: ( 502/ jay) Gid: ( 502/ jay)
Access: 2013-04-19 11:07:30.000000000 -0500
Modify: 2013-04-19 11:07:30.000000000 -0500
Change: 2013-04-19 11:07:30.000000000 -0500
File: `file1 '
Size: 0 Blocks: 0 IO Block: 4096 regular empty file
Device: 802h/2050d Inode: 42008756 Links: 1
Access: (0664/-rw-rw-r--) Uid: ( 502/ jay) Gid: ( 502/ jay)
Access: 2013-04-19 11:07:30.000000000 -0500
Modify: 2013-04-19 11:07:30.000000000 -0500
Change: 2013-04-19 11:07:30.000000000 -0500