Multiple IP's on the same bridge

Question

I'm setting up a Ubuntu host machine for a couple of kvm virtual machines. Here is my interface config file:

# config block 0
auto lo vmbr0
iface lo inet loopback
iface vmbr0 inet static
    address 111.111.111.111
    netmask 255.255.255.0
    gateway 111.111.111.1
    bridge_ports eth0
    bridge_stp off



# config block 1
auto he-ipv6
iface he-ipv6 inet6 v4tunnel
        address 2001:470:1f06:639::2
        netmask 64
        endpoint 209.51.161.14
        local 111.111.111.111
        ttl 255
        gateway 2001:470:1f06:639::1



# config block 2
iface vmbr0 inet6 static
        address 2001:470:1f07:639::
        netmask 64
        gateway 2001:470:1f06:639::2



# config block 3
iface vmbr0 inet6 static
        address 2001:470:8a2a:ffff:ffff:ffff:ffff:ffff
        netmask 64
        gateway 2001:470:1f06:639::2

Let's say config block 0 is the bridge vmbr0 to eth0. config block 1 is the WAN IPv6 interface. config block 2 is my routable /64, and config block 3 is my routable /48. Now I found if the config block 2 and config block 3 both exist in the config file, only the IP in config block 2 works, and if I remove one of config block 2 or config block 3, the one left will work. So it seems I cannot config more than one additional IP addresses on the same bridge?