Velocity - value in foreach loop being reused

I'm using velocity with Cascade Server and I have to loop through some meta-data

<system-index-block name="foo" type="folder" current-time="1421260005397">        
    <system-page id="e538f3467f0001011e5362ee95c3a8ca">
        <name>name</name>
        <dynamic-metadata>
            <name>image</name>
            <!-- no <value> tag  -->
        </dynamic-metadata>
    </system-page>
    <system-page id="e538f3467f0001011e5362ee95c3a8ca">
        <name>name</name>        
        <dynamic-metadata>
            <name>image</name>
            <value>path/to/image</value>
        </dynamic-metadata>
    </system-page>
    <system-page id="e538f3467f0001011e5362ee95c3a8ca">
        <name>name</name>        
        <dynamic-metadata>
            <name>image</name>
            <!-- no <value> tag  -->
        </dynamic-metadata>
    </system-page>
</system-index-block>

So In this case I have to loop through each <system-page> tag and check the <dynamic-metadata> tag. If the page has an image path, it'll be inside a <value> tag like on the second element.

Heres my wee loop:

#foreach ( $section in $articles)
  #set ( $image = $section.getChild("dynamic-metadata").getChild("value").value )

  <section>

      #if ($image)
          <h1>Do this</h1>
      #else
          <h3>Do this instead</h3>
      #end

  </section>

 #end

The expected output here should be :

<section>
  <h3>Do this instead</h3>
<section>
<section>
  <h1>Do this</h1>
<section>
<section>
  <h3>Do this instead</h3>
<section>

However what I get is:

<section>
  <h3>Do this instead</h3>
<section>
<section>
  <h1>Do this</h1>
<section>
<section>
  <h1>Do this</h1>
<section>

So there you have it. When a set in the iteration has a value for the path, and the following set does not, the value from the previous set is carried over.

Why?

I hope I was able to explain this in a somewhat reasonable matter.