two equal filenames in one dir

[Jiri B]

Hello,

I'm confused, how is it possible I have two files with same
names in one dir?

$ ls -li
total 1245376
3611817 -rw-r--r--  1 jirib  jirib  168392755 Jan 14 23:35 
Crostata_Alla_Fruta.mp4
3741698 -rw-r--r--  1 jirib  jirib  165519511 Mar 12  2010 Pizza 
Margherita-10115892.mp4
3611818 -rw-r--r--  1 jirib  jirib  165519511 Jan 14 23:35 
Pizza_Margherita-10115892.mp4
3741699 -rw-r--r--  1 jirib  jirib   68932635 Jul 31 21:02 jablecny 
kolac-46705666.mp4
3611819 -rw-r--r--  1 jirib  jirib   68932635 Jan 14 23:35 
jablecny_kolac-46705666.mp4

$ sysctl kern.version 
kern.version=OpenBSD 5.2-current (GENERIC.MP) #20: Mon Jan 21 17:23:23 MST 2013
    t...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP

jirib