Attachment.php File Question

Ok I haven’t had any luck finding an answer to this problem, hopefully someone might have a clue.

I’ve stripped a lot of code out of the attachment.php page and this is what I have:

<?php if (have_posts()) : the_post(); ?>

<?php $attachment_link = get_the_attachment_link($post->ID, true); ?>
<?php $_post = &get_post($post->ID); ?>

				<?php echo $attachment_link; ?>

	<?php else: ?>

The problem is that it displays the wrong attachments at times. I found out that it looks as if when posts have the same image beginning file name (for instance photo1-file.jpg) as another post, it is displaying the image of the other post. The post and filenames are completely different but I guess WordPress cuts off the filename.

Examples:

/this-is-a-sample-post/image1-file/
/another-sample-post/image1-file/

If you need to see a live site example I’ll be glad to provide anymore info. This problem is bugging the heck out of me and it is probably something simple to fix.

Thanks in advance!