Maven with Findbugs

Question

I am running findbugs and maven with this plugin and then the build fails even though if I run find bugs with the max setting of 20 through Eclipse I get 0 bugs. Now it fails with 33.

 <plugin>
    <groupId>org.codehaus.mojo</groupId>
    <artifactId>findbugs-maven-plugin</artifactId>
    <version>2.0.1</version>
    <configuration>
      <threshold>Ignore</threshold>
      <xmlOutput>true</xmlOutput>
    </configuration>
    <executions>
      <execution>
        <phase>verify</phase> 
        <goals>
          <goal>check</goal> 
        </goals>
      </execution>
    </executions>
  </plugin>

Two questions:

Why is there such a discrepancy between the Eclipse Findbugs plugin and the Maven Findbugs plugin?

Can I somehow make Eclipse Findbugs load the findbugscheck.xml generated from Maven Findbugs, so that my code is automatically highlighted. Fishing through the xml file is very annoying.