Gluster users - Oct 2014 - duplicate file name in glusterfs mount

Hello all,

I need help about a problem with Glusterfs 3.5.2-4 .
I create a distributed-replicated volume. Initially, the mount working
fine. 
>From some time, if I mount the volume with the command 
mount.glusterfs stor-stsys-c-tmp:/storage_c /mnt/

I see some file duplicated, like doHLT_4.cpp here:

ls -l /mnt/home/attilio.santocchia/
totale 178
drwxr-xr-x 13 1157 user  8192 ott 14 10:09 dati_data06
drwxr-xr-x  2 1157 user  8192 ott 22 09:32 dirFileStep1
drwxr-xr-x  2 1157 user  8192 ott 22 09:32 dirFileStep2
-rwxr-xr-x  1 1157 user 17316 ott 22 17:01 doHLT_4.cpp
-rwxr-xr-x  1 1157 user 17316 ott 22 17:01 doHLT_4.cpp
drwxr-xr-x  4 1157 user 69632 ott 22 09:32 mySearch2014
drwxr-xr-x  2 1157 user 40960 ott 20 18:02 oldMyS
drwxr-xr-x  2 1157 user 12288 ott 21 14:53 oldUI

I try to heal the volume with gluster volume heal command, and I try to
fix the layout.

I try to delete the volume and create again, but the same files remain
duplicated.

The trusted storage pool is formed by 3 servers, 2 of them are 64-bit
architecture with normal SATA disk, while the other is 32-bit
architecture with the gluster brick on a RAID6 in ARECA controller. 

Can you help me, please?

Thank you,
Andrea