Is there a limit to the number of slides you can have?

My client wants to see 16 slides in the slideshow, which seemed perfectly doable considering that the javascript looks up how many images there are and how big they are, then just cycles through. I'm running into a problem where if I add more than 12 slides, when the slideshow is running it starts flipping through all the previous slides on the way to the next one once you get to slide thirteen.

For example:
slide 10 to slide 11: smooth transition
slide 11 to slide 12: smooth transition
slide 12 to slide 13: you see slides 1-12 slide through really quick, then you get to slide 13
slide 13 to slide 14: you see slides 1-13 slide through really quick, then you get to slide 14
etc.

It looks like it's doing what should happen when you get to the end of the slideshow and go back to the first slide, but instead you get all the slides in the middle. Once you get to the end, rather than scrolling back through it just jumps statically to the first one.

Any ideas what's up? I thought it might be a deal with image size, but I think it still happens when I swap out what image is shown in that 13th spot.

Here is my slideshow code:

    <div id="banner">
    <?php print render($page['banner']); ?>
    
        <div class="main_view">
            <div class="window">
                <div class="image_reel">
                    <a href="<?php print url('about'); ?>"><img src="<?php print base_path() . drupal_get_path('theme', 'bluemasters') . 					'/slideshow/about-IMGP6115crop.jpg'; ?>"></a>
                    <a href="<?php print url('http://www.racing.com'); ?>"><img src="<?php print base_path() . drupal_get_path('theme', 'bluemasters') . '/slideshow/end-IMG_8229_peck2009crop.jpg'; ?>"></a>
                    <a href="<?php print url('youth'); ?>"><img src="<?php print base_path() . drupal_get_path('theme', 'bluemasters') . 					'/slideshow/youth-nznd075crop.jpg'; ?>"></a>
                    <a href="<?php print url('community'); ?>"><img src="<?php print base_path() . drupal_get_path('theme', 'bluemasters') . 				'/slideshow/community-IMG_8148crop.jpg'; ?>"></a>
                    <a href="<?php print url('news'); ?>"><img src="<?php print base_path() . drupal_get_path('theme', 'bluemasters') . 					'/slideshow/news-IMGP5214crop.jpg'; ?>"></a>
                    <a href="<?php print url('media'); ?>"><img src="<?php print base_path() . drupal_get_path('theme', 'bluemasters') . 					'/slideshow/media-IMGP2429crop.jpg'; ?>"></a>
                    <a href="<?php print url('store'); ?>"><img src="<?php print base_path() . drupal_get_path('theme', 'bluemasters') . 					'/slideshow/store-IMG_0186crop.jpg'; ?>"></a>
                    <a href="<?php print url('donate'); ?>"><img src="<?php print base_path() . drupal_get_path('theme', 'bluemasters') . 					'/slideshow/donate-IMGP6688crop.jpg'; ?>"></a>
                    <a href="<?php print url('about'); ?>"><img src="<?php print base_path() . drupal_get_path('theme', 'bluemasters') . 					'/slideshow/about-IMG_7718crop.jpg'; ?>"></a>
                    <a href="<?php print url('http://www.racing.com'); ?>"><img src="<?php print base_path() . drupal_get_path('theme', 'bluemasters') . '/slideshow/end-070crop.jpg'; ?>"></a>
                    <a href="<?php print url('youth'); ?>"><img src="<?php print base_path() . drupal_get_path('theme', 'bluemasters') . 					'/slideshow/youth-IMGP4934crop.jpg'; ?>"></a>
                    <a href="<?php print url('community'); ?>"><img src="<?php print base_path() . drupal_get_path('theme', 'bluemasters') . 				'/slideshow/community-IMGP5726crop.jpg'; ?>"></a>
                    <a href="<?php print url('news'); ?>"><img src="<?php print base_path() . drupal_get_path('theme', 'bluemasters') . 					'/slideshow/news-IMGP6152crop.jpg'; ?>"></a>
                    <a href="<?php print url('media'); ?>"><img src="<?php print base_path() . drupal_get_path('theme', 'bluemasters') . 					'/slideshow/media-041crop.jpg'; ?>"></a>
                    <a href="<?php print url('store'); ?>"><img src="<?php print base_path() . drupal_get_path('theme', 'bluemasters') . 					'/slideshow/store-IMG_8035crop.jpg'; ?>"></a>
                    <a href="<?php print url('donate'); ?>"><img src="<?php print base_path() . drupal_get_path('theme', 'bluemasters') . 					'/slideshow/donate-031crop.jpg'; ?>"></a>
                </div>
                <div class="descriptions">
                    <div class="desc" style="display: none;">About</div>                
                    <div class="desc" style="display: none;">Racing</div>
                    <div class="desc" style="display: none;">Youth</div>
                    <div class="desc" style="display: none;">Community Projects</div>
                    <div class="desc" style="display: none;">News</div>                
                    <div class="desc" style="display: none;">Media</div>
                    <div class="desc" style="display: none;">Store</div>
                    <div class="desc" style="display: none;">Donate</div>
                    <div class="desc" style="display: none;">About</div>                
                    <div class="desc" style="display: none;">Racing</div>
                    <div class="desc" style="display: none;">Youth</div>
                    <div class="desc" style="display: none;">Community Projects</div>
                    <div class="desc" style="display: none;">News</div>                
                    <div class="desc" style="display: none;">Media</div>
                    <div class="desc" style="display: none;">Store</div>
                    <div class="desc" style="display: none;">Donate</div>
                </div>
            </div>
        
            <div class="paging">
                <a rel="1" href="#">1</a>
                <a rel="2" href="#">2</a>
                <a rel="3" href="#">3</a>
                <a rel="4" href="#">4</a>
                <a rel="5" href="#">5</a>
                <a rel="6" href="#">6</a>
                <a rel="7" href="#">7</a>
                <a rel="8" href="#">8</a>
                <a rel="9" href="#">9</a>
                <a rel="10" href="#">10</a>
                <a rel="11" href="#">11</a>
                <a rel="12" href="#">12</a>
                <a rel="13" href="#">13</a>
                <a rel="14" href="#">14</a>
                <a rel="15" href="#">15</a>
                <a rel="16" href="#">16</a>
            </div>
        </div>
    </div><!--EOF:banner-->