How to disable NServiceBus completely

Is it possible to disable retries in NServiceBus, version 3.2.2?

Using the following configuration, retries can be disabled:

  <MsmqTransportConfig NumberOfWorkerThreads="1"
                       MaxRetries="0" />

  <SecondLevelRetriesConfig Enabled="false"
                            TimeIncrease="00:00:10"
                            NumberOfRetries="0" />

But not when the number of threads is set to 20. In this case, the message is repeated twice:

  <MsmqTransportConfig NumberOfWorkerThreads="20"
                       MaxRetries="0" />

  <SecondLevelRetriesConfig Enabled="false"
                            TimeIncrease="00:00:10"
                            NumberOfRetries="0" />

This is very much like a mistake. The behavior of the repetitions should not depend on the number of threads.