Possible bug with Tranql DataSourceMCF

I've been testing the Tranql DataSourceMCF in my Spring app and have run
into a problem.  I'd like to see if this is an actual bug before I open
a new JIRA issue.  It seems Tranql is not using the database connection
URL to distinguish underlying connections in its connection pool, which
causes DataSourceMCF to sometimes return a connection to the wrong DB!  
I have two DataSourceMCFs defined in my Spring app that connect to two
different databases.  They both use the same DB driver and the same
username/password.  The only difference is in the URL.  See below for my
Spring xml.  Anyway, the 'audit.ds' is almost always returning a
connection to the 'main.ds' database - unless all connections to the
'main.ds' in the connection pool are exhausted.  Is this expected?  
Should I be using a different ConnectionManager with each
DataSourceMCF?  Or is this a bug?
Note, I'm using Jencks 2, and I've modified the Spring config below to
show our test HSQLDB config.

Thanks,
  Andy

Here is my Spring config:

<beans>
  ...
  <bean id="transactionManager"
class="org.jencks.factory.TransactionManagerFactoryBean"/>
 
  <bean id="connectionManager"
class="org.jencks.factory.ConnectionManagerFactoryBean">
    <property name="transactionManager" ref="transactionManager"/>
    <property name="poolMaxSize" value="20"/>
  </bean>

  <bean id="main.ds"
class="org.jencks.factory.ConnectionFactoryFactoryBean">
    <property name="managedConnectionFactory">
      <bean class="org.jencks.tranql.DataSourceMCF">
        <property name="driverName" value="org.hsqldb.jdbcDriver"/>
        <property name="user" value="sa"/>
        <property name="password" value=""/>
        <property name="url" value="jdbc:hsqldb:file:testmain"/>
      </bean>
    </property>
  </bean>

  <bean id="audit.ds"
class="org.jencks.factory.ConnectionFactoryFactoryBean">
    <property name="managedConnectionFactory">
      <bean class="org.jencks.tranql.DataSourceMCF">
        <property name="driverName" value="org.hsqldb.jdbcDriver"/>
        <property name="user" value="sa"/>
        <property name="password" value=""/>
        <property name="url" value="jdbc:hsqldb:file:testaudit"/>
      </bean>
    </property>
  </bean>
  ...
</beans>

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