two responses from one request - how is it possible ?

[Jakub 1983]

http://www.mulesoft.com/tomcat-connector states:

Using the current arrangement, both Connectors will pass all requests to
the same Engine, which will in turn pass all these requests to both of its
contained web applications.  This means that each request will potentially
generate two responses, one from each application.
<Server>
  <Service>
    <Connector port="8443"/>
    <Connector port="8444"/>
    <Engine>
      <Host name="yourhostname">
        <Context path="/webapp1"/>
        <Context path="/webapp2"/>
      </Host>
    </Engine>
  </Service>
</Server>

Is it really true what they write ?

regards
Jakub