[Yaffs] Trouble with multiple files with the same name...

Hi all,

I found a strange behaviour of the yaffs filesystem.
I mounted my nand device, then  I wrote the data. Finally I executed 
some executables. All seems to work fine.
When I reboot my board and try to run again my executables, thera are 
some problems. In particular I find that there are multiple files with 
the same name within a directory... I cannot delete them.
ls -la
-rw-r--r--    1 root     root           70 Jan  1 00:01 
defaultbuttons_new.conf
-rw-r--r--    1 root     root           70 Jan  1 00:01 
defaultbuttons_new.conf
-rw-r--r--    1 root     root           70 Jan  1 00:01 
defaultbuttons_new.conf
-rw-r--r--    1 root     root           70 Jan  1 00:01 
defaultbuttons_new.conf
-rw-r--r--    1 root     root           70 Jan  1 00:01 
defaultbuttons_new.conf

Have you any explanation? I do not understand which could be the problem.
cat /proc/yaffs is the following
Device yaffs
startBlock......... 0
endBlock........... 4095
chunkGroupBits..... 2
chunkGroupSize..... 4
nErasedBlocks...... 2176
nTnodesCreated..... 5200
nFreeTnodes........ 3212
nObjectsCreated.... 2400
nFreeObjects....... 407
nFreeChunks........ 94449
nPageWrites........ 5746
nPageReads......... 35331
nBlockErasures..... 0
nGCCopies.......... 9
garbageCollections. 680
passiveGCs......... 680
nRetriedWrites..... 0
nRetireBlocks...... 680
eccFixed........... 0
eccUnfixed......... 0
tagsEccFixed....... 0
tagsEccUnfixed..... 2239
cacheHits.......... 0
nDeletedFiles...... 1984
nUnlinkedFiles..... 1991
nBackgroudDeletions 0
useNANDECC......... 1
nShortOpCaches..... 10

Livius