I have a dispatcher setting using only rweight and the customer is complaining that not all destinations are reached, do I doing something wrong here ?

below the dispatcher.list, the sum of all the weight values is 100

# asterisk group 2 2 sip:192.168.16.20:5060 0 rweight=45;duid=asterisk_1 2 sip:192.168.16.13:5060 0 rweight=11;duid=asterisk_2 2 sip:192.168.16.14:5060 0 rweight=11;duid=asterisk_3 2 sip:192.168.16.15:5060 0 rweight=11;duid=asterisk_4 2 sip:192.168.16.16:5060 0 rweight=11;duid=asterisk_5 2 sip:192.168.16.21:5060 0 rweight=11;duid=asterisk_6

Thanks in advance.