Мне кажется, я нашел ответ.Просто нужно добавить
<b:if cond='data:blog.pageType == "item"'>
<b:include cond='data:newerPageUrl' name='previousPageLink'/>
<b:include cond='data:olderPageUrl' name='nextPageLink'/>
</b:if>
В этом коде
<div class='post-bottom'>
<div class='post-footer'>
<!-- Footer bylines -->
<b:include name='footerBylines'/>
</div>
<b:include cond='data:view.isSingleItem and data:widget.type == "Blog"' data='{ shareButtonClass: "post-share-buttons-bottom", overridden: true }' name='maybeAddShareButtons'/>
<b:include cond='data:view.isMultipleItems or data:widget.type == "PopularPosts"' data='post' name='postJumpLink'/>
</div>
Вот так
<div class='post-bottom'>
<div class='post-footer'>
<!-- Footer bylines -->
<b:include name='footerBylines'/>
</div>
<b:include cond='data:view.isSingleItem and data:widget.type == "Blog"' data='{ shareButtonClass: "post-share-buttons-bottom", overridden: true }' name='maybeAddShareButtons'/>
<b:include cond='data:view.isMultipleItems or data:widget.type == "PopularPosts"' data='post' name='postJumpLink'/>
<b:if cond='data:blog.pageType == "item"'>
<b:include cond='data:newerPageUrl' name='previousPageLink'/>
<b:include cond='data:olderPageUrl' name='nextPageLink'/>
</b:if>
</div>