foreach loop ignoring array content

I have a foreach loop that loops through an array, and spits out data in the form of a HTML table.

The basic flow is as follows

<?php foreach($credits as $credit) : ?>
    <?php if($credit['credit_type'] == "long") : ?>
            <?php if($credit['category_title'] != $oldvalue) : ?>
                <?php echo $oldvalue . " changed to ". $credit['category_title']; ?>
                <br /><?php echo $count; ?>
                <table width="100%" cellpadding="0" cellspacing="0" border="0">
                    <tr>
                        <td><?php echo $credit['category_position']; ?></td>
                        <td><?php echo $credit['category_title']; ?></td>
                        <td><strong>Title</strong></td>
                        <td><strong>Role</strong></td>
                        <td><strong>Director</strong></td>
                    </tr>

                    <tr>
                        <td><?php echo $credit['credit_position']; ?></td>
                        <td><?php echo $credit['credit_heading']; ?></td>
                        <td><?php echo $credit['credit_title']; ?></td>
                        <td><?php echo $credit['credit_role']; ?></td>
                        <td><?php echo $credit['credit_director']; ?></td>
                    </tr>
                </table>
                <?php $oldvalue = $credit['category_title']; ?>
                <?php echo $count++; ?>
            <?php endif; ?>
        <?php endif; ?>
        <?php endforeach; ?>

My problem is that in the first loop the credit type is commercial, and commercial has 2 entries however the loop only ever prints the first one, and not the second one, why is this? How can I resolve this?

The array I looping through looks like this,

    Array
(
    [0] => Array
        (
            [credit_id] => 5
            [credit_heading] => Test Heading 4
            [credit_title] => Test Title 4
            [credit_role] => Test Role 4
            [credit_director] => Test Director 4
            [credit_type] => long
            [credit_position] => 1
            [date_created] => 2012-01-05 11:47:50
            [candidates_candidate_id] => 54
            [rel_id] => 
            [credits_candidate_id] => 
            [credits_credit_id] => 
            [category_title] => 
            [category_position] => 
        )

    [1] => Array
        (
            [credit_id] => 2
            [credit_heading] => Test Heading 2
            [credit_title] => Test Title 2
            [credit_role] => Test Role 2
            [credit_director] => Test Director 2
            [credit_type] => long
            [credit_position] => 2
            [date_created] => 2012-01-04 07:46:15
            [candidates_candidate_id] => 54
            [rel_id] => 
            [credits_candidate_id] => 
            [credits_credit_id] => 
            [category_title] => 
            [category_position] => 
        )

    [2] => Array
        (
            [credit_id] => 4
            [credit_heading] => Test Heading 3
            [credit_title] => Test Title 3
            [credit_role] => Test Role 3
            [credit_director] => Test Director 3
            [credit_type] => long
            [credit_position] => 1
            [date_created] => 2012-01-05 10:52:07
            [candidates_candidate_id] => 54
            [rel_id] => 2
            [credits_candidate_id] => 54
            [credits_credit_id] => 4
            [category_title] => Commercial
            [category_position] => 0
        )

    [3] => Array
        (
            [credit_id] => 6
            [credit_heading] => Test Heading 4
            [credit_title] => Test Title 4
            [credit_role] => Test Role 4
            [credit_director] => Test Director 4
            [credit_type] => long
            [credit_position] => 1
            [date_created] => 2012-01-05 11:48:31
            [candidates_candidate_id] => 54
            [rel_id] => 3
            [credits_candidate_id] => 54
            [credits_credit_id] => 6
            [category_title] => Commercial
            [category_position] => 0
        )

    [4] => Array
        (
            [credit_id] => 1
            [credit_heading] => Test Heading 1
            [credit_title] => Test Title 1
            [credit_role] => Test Role 1
            [credit_director] => Test Director 1
            [credit_type] => long
            [credit_position] => 1
            [date_created] => 2012-01-04 07:46:15
            [candidates_candidate_id] => 54
            [rel_id] => 1
            [credits_candidate_id] => 54
            [credits_credit_id] => 1
            [category_title] => Television
            [category_position] => 1
        )

)

and the final output looks likes this,

<table width="100%" cellpadding="0" cellspacing="0" border="0">
                <tr>
                    <td>0</td>
                    <td>Commercial</td>
                    <td><strong>Title</strong></td>

                    <td><strong>Role</strong></td>
                    <td><strong>Director</strong></td>
                </tr>

                <tr>
                    <td>1</td>
                    <td>Test Heading 3</td>

                    <td>Test Title 3</td>
                    <td>Test Role 3</td>
                    <td>Test Director 3</td>
                </tr>
            </table>
            <table width="100%" cellpadding="0" cellspacing="0" border="0">

                <tr>
                    <td>1</td>
                    <td>Television</td>
                    <td><strong>Title</strong></td>
                    <td><strong>Role</strong></td>
                    <td><strong>Director</strong></td>

                </tr>

                <tr>
                    <td>1</td>
                    <td>Test Heading 1</td>
                    <td>Test Title 1</td>
                    <td>Test Role 1</td>

                    <td>Test Director 1</td>
                </tr>
            </table>