Cannot add more 8 source address in securi nat?

Hi All,

Is there any limitation in SRX5800 chassis cluster setup with Logical System to add more than 8 ip address in source address in security nat stanza. I'm look this url http://forums.juniper.net/t5/SRX-Services-Gateway/NAT-rules-limitation-on-SRX/m-p/38317 but it's look like due to junos version. But my junos is 15.1.X49-D70. Appreciate someone feedback

{primary:node0}[edit security nat source rule-set NAT-SRC rule NAT-SRC-10]
test@SRX5800:LSYS-06# show
match {
    ##
    ## Warning: number of elements exceeds limit of 8
    ##
    source-address [ 192.168.1.0/24 192.168.20.0/24 192.168.40.0/24 192.168.80.0/24 192.168.90.0/24 192.168.150.0/24 192.168.110.0/24 192.168.123.0/24 192.168.240.0/24 ];
    destination-address [ 10.168.14.0/24 10.168.15.0/24 10.168.16.0/24 10.168.17.0/24 ];
}
then {
    source-nat {
        pool {
            LSYS-6;
        }
    }
}