Why does WP_Query show only the same post even with different categories and endwhile?

Question

I have 3 divs that WP_Query with 3 different categories and end it with the php endwhile,but it only shows the same most recent post query three times over. Do I need to hard reset the query loop somehow? I'm looking to see where to put wp_reset_postdata...

<div>
    <?php $test = new WP_Query('category=[errands]&showposts=1');
    while ($test->have_posts()) : $test->the_post(); ?>
    <h2><?php the_title(); ?></h2>
    <img src="<?php bloginfo('template_directory'); ?>/images/errands.jpg" />

        <?php the_content(__('Read more'));?>
        <?php endwhile;?>
        <?php wp_reset_postdata(); ?>

</div>

 <div>
    <?php $test2 = new WP_Query('category=[shopping]&showposts=1');
    while ($test2->have_posts()) : $test2->the_post(); ?>
    <h2><?php the_title(); ?></h2>
    <img src="<?php bloginfo('template_directory'); ?>/images/shopping.jpg" />

        <?php the_content(__('Read more'));?>
        <?php endwhile;?>
        <?php wp_reset_postdata(); ?>

</div>

 <div>
    <?php $test3 = new WP_Query('category=[calendar_maintenance]&showposts=1');
    while ($test3->have_posts()) : $test3->the_post(); ?>
    <h2><?php the_title(); ?></h2>
    <img src="<?php bloginfo('template_directory'); ?>/images/calendar.jpg" />

        <?php the_content(__('Read more'));?>
        <?php endwhile;?>
        <?php wp_reset_postdata(); ?>

</div>

Answer 1

If you want your posts based on different categories you should use category_name or cat as category id. For example;

<?php $test = new WP_Query('cat=1&showposts=1'); // where 1 is the id of your cat ?> 

Or

 <?php $test = new WP_Query('category_name=errands&showposts=1'); ?>

Also, you need to call wp_reset_postdata(); after each WP_Query. I hope this helps

More on how to use categories in WP_Query

http://codex.wordpress.org/Class_Reference/WP_Query