Pool round-robin load balancing not balanced

Ok, see below, pretty straightforward. I also tried changing the profile in the Virtual definition to Standard, made no difference..

pool pool_live.sample.com_40001 {
   monitor all slow_icmp
   members {
      10.48.2.37:40001 {}
      10.48.2.38:40001 {}
      10.48.2.39:40001 {}
      10.48.2.42:40001 {}
   }
}
pool pool_live.sample.com_http {
   monitor all slow_icmp
   members {
      10.48.2.37:http {}
      10.48.2.38:http {}
      10.48.2.39:http {}
      10.48.2.42:http {}
   }
}

virtual live.sample.com_http {
   pool pool_live.sample.com_http
   destination 10.48.254.79:http
   ip protocol tcp
   rules SelectiveSNAT
   profiles fastL4 {}
}
virtual live.sample.com_https {
   pool pool_live.sample.com_40001
   destination 10.48.254.79:https
   ip protocol tcp
   rules SelectiveSNAT
   profiles fastL4 {}
}