Post not showing under category

Hi Carlie,
Are the posts in question Published? If you are OK with WP_Query you can try this:

$query = new WP_Query(array(
    'post_type' => 'travelog',
    'paged' => $currentPage,
    'posts_per_page' => 3,
    'orderby' => 'date',
    'order' => 'DESC',
    'post_status' => array('publish','future','pending')
));

The major post_status-es WP handles are:

'publish' - a published post or page
'pending' - post is pending review
'draft' - a post in draft status
'auto-draft' - a newly created post, with no content
'future' - a post to publish in the future
'private' - not visible to users who are not logged in
'inherit' - a revision. see get_children.
'trash' - post is in trashbin.

Your posts should fall in any of the above statuses.