The consumer behavior if use autolink (waypoint yes and no)

Issue

I am using AMQ interconnect autolink, I found that :

• if I did not set the address as waypoint, looks like the consumers to the router can only receive some messages. The broker in this usage scenario is also like a consumer.
  suppose there are 2 consumers, 1 producer connected to the router,if a producer send 9 messages to the router, then consumer1, consumer2, broker will receive 3 messages, looks like a balance pattern. If now a new consumer3 connects to router, it cannot consume the 3 messages in the broker.
• But if I set the waypoint to yes, then the consumer1 and consumer2 will receive 5 messages. There is no messages here left in the broker side. I suppose this is expected.

Would you pls explain the behavior for these 2 setting? When autolink is being used, setting the address as waypoint is recommended?

autoLink {
  addr: SampleQueue
  connection: broker
  dir: out
}

autoLink {
  addr: SampleQueue
  connection: broker
  dir: in
}

connector {
    name: broker
    role: route-container
    host: 192.168.1.105
    port: 61616
    saslMechanisms: ANONYMOUS
}