2 Xymon the second have some data not send to it

Hello, 
I have 2 xymon server

1st one (xymon01=172.16.2.108) : all clients send data do it (*toto* +
*titi*) 
2nd one (back01=172.16.1.198)  : only few clients (only with name like
*toto*) send data to it

For exemple back01 https://back01/xymon-cgi/confreport.sh
   i see all hosts (titi02 for exemple) that only send data to xymon01
   only 
===> how is it possible ?


client toto04 :
 grep "^XYMONSERVERS" /etc/default/xymon-client
  XYMONSERVERS="172.16.2.108 172.16.1.198"

client titi02:
 grep "^XYMONSERVERS" /etc/default/xymon-client
  XYMONSERVERS="172.16.2.108"


I do 
 grep -r titi02 /etc/xymon /usr/lib/xymon /var/lib/xymon 
on back01, but nothing is reporting 

--
Greg