Namespaces matter? Savon chooses wrong namespaces...

[DerNalia]

What soapUI gives (and this works when I submit it)

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:api="http://api.echosign" xmlns:dto="http://dto.api.echosign" xmlns:dto8="http://dto8.api.echosign" xmlns:dto9="http://dto9.api.echosign">

  <soapenv:Body>

    <api:createEmbeddedWidget>

      <api:apiKey>key</api:apiKey>

      <api:senderInfo>

        <dto:email>email</dto:email>

        <dto:password>pass</dto:password>

      </api:senderInfo>

      <api:widgetInfo>

        <dto8:fileInfos>

          <dto:FileInfo>

            <dto:fileName>Copy of Copy of Copy of Copy of Copy of ... created on the herp.pdf</dto:fileName>

            <dto:url>any url to a pdf</dto:url>

          </dto:FileInfo>

        </dto8:fileInfos>

        <dto8:name>Copy of Copy of Copy of Copy of Copy of ... created on the herp</dto8:name>

      </api:widgetInfo>

    </api:createEmbeddedWidget>

  </soapenv:Body>

</soapenv:Envelope>

What Savon generates:

<soapenv:Envelope xmlns:ins9="http://dto11.api.echosign" xmlns:ins8="http://dto12.api.echosign" xmlns:ins7="http://dto7.api.echosign" xmlns:ins6="http://dto10.api.echosign" xmlns:ins5="http://dto8.api.echosign" xmlns:ins4="http://dto9.api.echosign" xmlns:ins3="http://dto13.api.echosign" xmlns:ins2="http://dto14.api.echosign" xmlns:ins1="http://api.echosign" xmlns:ins0="http://dto.api.echosign" xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:wsdl="http://api.echosign">

  <soapenv:Body>

    <ins1:createEmbeddedWidget>

      <ins1:apiKey>key</ins1:apiKey>

      <ins1:senderInfo>

        <ins0:email>email</ins0:email>

        <ins0:password>pass</ins0:password>

      </ins1:senderInfo>

      <ins1:widgetInfo>

        <ins5:fileInfos>

          <wsdl:FileInfo>

            <wsdl:fileName>Copy of Copy of Copy of Copy of Copy of ... created on the herp.pdf</wsdl:fileName>

            <wsdl:url>any url to a pdf</wsdl:url>

          </wsdl:FileInfo>

        </ins5:fileInfos>

        <ins5:name>Copy of Copy of Copy of Copy of Copy of ... created on the herp</ins5:name>

      </ins1:widgetInfo>

    </ins1:createEmbeddedWidget>

  </soapenv:Body>

</soapenv:Envelope>

notice that they are entirely the same, aside from the namespaces. Is this a bug? 
here is the WSDL:

https://secure.echosign.com/services/EchoSignDocumentService14?wsdl