IPS failed to update Pattern

Hi,

is this normal ?

==> u2d.log <==

DEBUG Apr 03 10:44:52 [13686]: --fwversion = 16.05.1.139
DEBUG Apr 03 10:44:52 [13686]: --productcode = CN
DEBUG Apr 03 10:44:52 [13686]: --model = CR50iNG
DEBUG Apr 03 10:44:52 [13686]: --vendor = AM03
DEBUG Apr 03 10:44:52 [13686]: --pkg_ips_version = 3.13.36
DEBUG Apr 03 10:44:52 [13686]: --pkg_ips_cv = 12.0
DEBUG Apr 03 10:44:52 [13686]: --pkg_atp_version = 1.0.0136
DEBUG Apr 03 10:44:52 [13686]: --pkg_atp_cv = 1.00
DEBUG Apr 03 10:44:52 [13686]: --pkg_savi_version = 1.0.10733
DEBUG Apr 03 10:44:52 [13686]: --pkg_savi_cv = 1.00
DEBUG Apr 03 10:44:52 [13686]: --pkg_apfw_version = 7.0.001
DEBUG Apr 03 10:44:52 [13686]: --pkg_apfw_cv = 1.00
DEBUG Apr 03 10:44:52 [13686]: --pkg_waf_version = 1.0.0006
DEBUG Apr 03 10:44:52 [13686]: --pkg_waf_cv = 1.00
DEBUG Apr 03 10:44:52 [13686]: --pkg_sslvpn_version = 1.0.006
DEBUG Apr 03 10:44:52 [13686]: --pkg_sslvpn_cv = 1.00
DEBUG Apr 03 10:44:52 [13686]: --pkg_clientauth_version = 1.0.0005
DEBUG Apr 03 10:44:52 [13686]: --pkg_clientauth_cv = 2.00
DEBUG Apr 03 10:44:52 [13686]: --pkg_redfw_version = 2.0.006
DEBUG Apr 03 10:44:52 [13686]: --pkg_redfw_cv = 2.00

CR50iNG_AM03_SFOS 16.05.1 MR-1# ls -altr ips_12.0/
drwxr-xr-x 3 root 0 1024 Mar 22 10:23 3.13.36
drwxr-xr-x 4 root 0 1024 Mar 23 16:25 .
drwxr-xr-x 3 root 0 1024 Mar 24 11:24 3.13.37
drwxr-xr-x 22 root 0 1024 Apr 3 09:29 ..

is this normal ?

CR50iNG_AM03_SFOS 16.05.1 MR-1# df -h
Filesystem Size Used Available Use% Mounted on
rootfs 341.6M 2.5M 317.0M 1% /
df: /newroot: No such file or directory
df: /newroot/dev: No such file or directory
df: /newrootrw: No such file or directory
none 341.6M 2.5M 317.0M 1% /
none 996.5M 16.0K 996.4M 0% /dev
none 996.5M 6.5M 989.9M 1% /tmp
none 996.5M 12.8M 983.7M 1% /dev/shm
/dev/conf 385.4M 62.6M 322.8M 16% /conf
/dev/content 1.7G 425.3M 1.2G 25% /content
/dev/var 73.9G 11.0G 62.9G 15% /var

CR50iNG_AM03_SFOS 16.05.1 MR-1# uptime
14:46:39 up 31 days, 23:36, load average: 2.50, 2.71, 2.82

pattern - 0 size ? 

CR50iNG_AM03_SFOS 16.05.1 MR-1# ls u2d/ -al
drwxr-xr-x 2 root 0 1024 Apr 3 14:36 .
drwxr-xr-x 23 root 0 1024 Apr 3 14:34 ..
-rw-r--r-- 1 root 0 0 Apr 3 14:20 dr
-rw-r--r-- 1 root 0 225 Apr 3 14:37 firmware
-rw-r--r-- 1 root 0 0 Apr 3 14:36 pattern
-rw-r--r-- 1 root 0 6 Mar 9 16:25 pid_HW-SFOS_16.05.2_MR-2.SF210-160.gpg
-rw-r--r-- 1 root 0 2 May 12 2016 retry_count_savi_1.00_1.0.9116_fdiff20.tar.gz.gpg
-rw-r--r-- 1 root 0 91601 Mar 9 16:27 status_HW-SFOS_16.05.2_MR-2.SF210-160.gpg

I haven't moved to the latest firmware (HW-SFOS_16.05.2_MR-2.SF210-160),  still using SFOS 16.05.1 MR-1.