LinuxQuestions.org - enlarging ext3 problem with lvm

I am having a problem that can be reproduce very simply.
I create an ext3 filesystem of 100M, and (trying to ) enlarging by 100M.
The first and second enlargement work well, but not on the third one
I get the fsck error ?
Below is the script and the screen output at the end
CAN SOMEONE HELP SOLVE THIS PROBLEM ?
I CAN UNDERSTAND HOW I BUG SO EVIDENT IS NOT REPORTED ?

Linux lxmq1001 2.4.21-15.EL
# rpm -qa | grep -i lvm
lvm-1.0.3-15

The script is really simple and goes like this
umount /coco
lvremove -f /dev/datavg/cocolv
lvcreate -L100M -n cocolv datavg
mkfs.ext3 /dev/datavg/cocolv
mkdir /coco
mount -t ext3 /dev/datavg/cocolv /coco
df -k /coco
#echo "Press [ENTER] Create just done" ; read dummy

umount /coco
e2fsadm -L+100M /dev/datavg/cocolv
if [ $? -ne 0 ] ; then echo "Error Detected" ; read ohno ; fi
mount -t ext3 /dev/datavg/cocolv /coco
df -k /coco
#echo "Press [ENTER] First Extend done" ; read dummy

umount /coco
e2fsadm -L+100M /dev/datavg/cocolv
if [ $? -ne 0 ] ; then echo "Error Detected" ; read ohno ; fi
mount -t ext3 /dev/datavg/cocolv /coco
df -k /coco
#echo "Press [ENTER] to extend again" ; read dummy

umount /coco
e2fsadm -L+100M /dev/datavg/cocolv
if [ $? -ne 0 ] ; then echo "Error Detected" ; read ohno ; fi
mount -t ext3 /dev/datavg/cocolv /coco
df -k /coco

# ./ext3_test.sh
lvremove -- doing automatic backup of volume group "datavg"
lvremove -- logical volume "/dev/datavg/cocolv" successfully removed
lvcreate -- doing automatic backup of "datavg"
lvcreate -- logical volume "/dev/datavg/cocolv" successfully created

mke2fs 1.32 (09-Nov-2002)
Filesystem label=
OS type: Linux
Block size=1024 (log=0)
Fragment size=1024 (log=0)
25688 inodes, 102400 blocks
5120 blocks (5.00%) reserved for the super user
First data block=1
13 block groups
8192 blocks per group, 8192 fragments per group
1976 inodes per group
Superblock backups stored on blocks:
8193, 24577, 40961, 57345, 73729

Writing inode tables: done
Creating journal (4096 blocks): done
Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 29 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
mkdir: cannot create directory `/coco': File exists
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/datavg/cocolv 99150 4127 89903 5% /coco
e2fsck 1.32 (09-Nov-2002)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
/dev/datavg/cocolv: 11/25688 files (0.0% non-contiguous), 7377/102400 blocks
lvextend -- extending logical volume "/dev/datavg/cocolv" to 200 MB
lvextend -- doing automatic backup of volume group "datavg"
lvextend -- logical volume "/dev/datavg/cocolv" successfully extended

resize2fs 1.32 (09-Nov-2002)
Begin pass 1 (max = 12)
Extending the inode table XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
The filesystem on /dev/datavg/cocolv is now 204800 blocks long.

e2fsadm -- ext2fs in logical volume /dev/datavg/cocolv successfully extended to 200 MB

Filesystem 1K-blocks Used Available Use% Mounted on
/dev/datavg/cocolv 198562 4127 184195 3% /coco
e2fsck 1.32 (09-Nov-2002)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
/dev/datavg/cocolv: 11/49400 files (0.0% non-contiguous), 10365/204800 blocks
lvextend -- extending logical volume "/dev/datavg/cocolv" to 300 MB
lvextend -- doing automatic backup of volume group "datavg"
lvextend -- logical volume "/dev/datavg/cocolv" successfully extended

resize2fs 1.32 (09-Nov-2002)
Begin pass 1 (max = 13)
Extending the inode table XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Begin pass 2 (max = 1)
Relocating blocks XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Begin pass 3 (max = 25)
Scanning inode table XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Begin pass 5 (max = 19)
Moving inode table XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
The filesystem on /dev/datavg/cocolv is now 307200 blocks long.

e2fsadm -- ext2fs in logical volume /dev/datavg/cocolv successfully extended to 300 MB

Filesystem 1K-blocks Used Available Use% Mounted on
/dev/datavg/cocolv 297713 4165 278188 2% /coco
e2fsck 1.32 (09-Nov-2002)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
Block bitmap differences: -(16386--16387) -(32770--32771) -(49154--49155) -(65538--65539) -(81922--81923) -(90114--90115) -(98306--98307) -(106498--106499) -(114690--114691) -(122882--122883) -(131074--131075) -(139266--139267) -(147458--147459) -(155650--155651) -(163842--163843) -(172034--172035) -(180226--180227) -(188418--188419) -(196610--196611)
Fix<y>?