Showing strange size in df output

UNIX Solaris
1

Hi,
This is Solaris-10 box and in few of file-system (root file-system of non global zones), usage/available is not showing correct size. I am not able to figure out, what is eating up this space.
Global Server - bdrpod01
Non Global zone - bdrpod01-zputq01

root@bdrpod01:/root# df -h /zone/bdrpod01-zputq01/root
Filesystem             size   used  avail capacity  Mounted on
zputq01_root_pool/zone
                       8.4G   2.2G   1.7G    57%    /zone/bdrpod01-zputq01/root
root@bdrpod01:/root# zfs get all | grep -i zputq01_root_pool | egrep -i "quota|reservation"
zputq01_root_pool                         quota                 none                                  default
zputq01_root_pool                         reservation           none                                  default
zputq01_root_pool                         refquota              none                                  default
zputq01_root_pool                         refreservation        none                                  default
zputq01_root_pool                         usedbyrefreservation  0                                     -
zputq01_root_pool/zone                    quota                 8.40G                                 local
zputq01_root_pool/zone                    reservation           8.40G                                 local
zputq01_root_pool/zone                    refquota              none                                  default
zputq01_root_pool/zone                    refreservation        none                                  default
zputq01_root_pool/zone                    usedbyrefreservation  0                                     -
root@bdrpod01:/root#
root@bdrpod01:/root# zoneadm list -icv | grep -i zputq01
  15 bdrpod01-zputq01 running    /zone/bdrpod01-zputq01/root    native   shared
root@bdrpod01:/root#
root@bdrpod01:/root# zlogin bdrpod01-zputq01
[Connected to zone 'bdrpod01-zputq01' pts/3]
Last login: Thu Oct  2 13:17:16 on pts/7
Sun Microsystems Inc.   SunOS 5.10      Generic January 2005
You have mail.
Sourcing /root/.profile-EIS.....

DISPLAY=

root@bdrpod01-zputq01:/root# df -h /
Filesystem             size   used  avail capacity  Mounted on
/                      3.9G   2.2G   1.7G    57%    /
root@bdrpod01-zputq01:/root#
2

What does "zfs list -t all" show from the global zone?

3 
root@bdrpod01:/root# zfs list -t all | grep -i zputq01
zputq01_app_pool                          33.2G  1017M    18K  /zputq01_app_pool
zputq01_app_pool/apps                     1.65G  3.35G  1.65G  /zone/bdrpod01-zputq01/auto/apps
zputq01_app_pool/envs                     10.2G  18.0G  10.2G  /zone/bdrpod01-zputq01/auto/envs
zputq01_root_pool                         8.40G   152M    18K  none
zputq01_root_pool/zone                    6.69G  1.71G  2.22G  /zone/bdrpod01-zputq01/root
zputq01_root_pool/zone@patch_012314       4.47G      -  6.53G  -
root@bdrpod01:/root#