When using the Custom User Fields to make there own tab, when you view that tab on the item page, the tabs 2 to 5 disappear, even know the template nflj_showcase_item_field seems to hold the code to display them.
PHP:
<ul class="tabs showcaseTabs">
<li class="scTab1"><a href="{xen:link showcase, $item}">{$category.tab1_name}</a></li>
<xen:if is="{$category.tab2_name} && ({$t2.hasContent} || {$t2.hasCustomFieldContent})">
<li class="scTab2"><a href="{xen:link showcase, $item}#tab2">{$category.tab2_name}</a></li>
</xen:if>
<xen:if is="{$category.tab3_name} && ({$t3.hasContent} || {$t3.hasCustomFieldContent})">
<li class="scTab3"><a href="{xen:link showcase, $item}#tab3">{$category.tab3_name}</a></li>
</xen:if>
<xen:if is="{$category.tab4_name} && ({$t4.hasContent} || {$t4.hasCustomFieldContent})">
<li class="scTab4"><a href="{xen:link showcase, $item}#tab4">{$category.tab4_name}</a></li>
</xen:if>
<xen:if is="{$category.tab5_name} && ({$t5.hasContent} || {$t5.hasCustomFieldContent})">
<li class="scTab5"><a href="{xen:link showcase, $item}#tab5">{$category.tab5_name}</a></li>
</xen:if>
<xen:if is="{$item.attach_count} && !{$item.displayGalleryT1}">
<li class="scTabImages"><a href="{xen:link showcase, $item}#timages">{xen:phrase nflj_showcase_image_gallery}</a></li>
</xen:if>
<!-- slot: scItemTabs1 -->
<xen:if is="{$item.customFieldTabs}">
<xen:foreach loop="{$item.customFieldTabs}" value="$_fieldId">
<li class="showcaseTabExtra scTabField-{$fieldId} {xen:if '{$selectedTab} == "field_{$_fieldId}"', active}">
<a href="{xen:link showcase/field, $item, 'field={$_fieldId}'}">{xen:helper showcaseFieldTitle, $_fieldId}</a>
</li>
</xen:foreach>
</xen:if>
<!-- slot: scItemTabs2 -->
<xen:if is="{$item.review_count}">
<li class="scTabReview"><a href="{xen:link showcase/reviews, $item}">{xen:phrase nflj_showcase_reviews} ({$item.review_count})</a></li>
</xen:if>
<!-- slot: scItemTabs3 -->
<xen:if is="{$thread}">
<li class="scTabDiscussion"><a href="{xen:link threads, $thread}">{xen:phrase nflj_showcase_discussion} ({xen:number $thread.reply_count})</a></li>
</xen:if>
<!-- slot: scItemTabs4 -->
</ul>