The template documentation mentions the two User12 and User13 positions
http://www.joomlart.com/forums/topic/ja-lime-template-installation-and-configuration/
But these two positions are missing from the templateDetails.xml file in templates/ja_lime
<positions>
<position>hornav</position>
<position>breadcrumbs</position>
<position>search</position>
<position>banner</position>
<position>left</position>
<position>right</position>
<position>top</position>
<position>ja-cpanel</position>
<position>slideshow</position>
<position>user1</position>
<position>user2</position>
<position>user3</position>
<position>user4</position>
<position>user5</position>
<position>user6</position>
<position>user7</position>
<position>user8</position>
<position>user9</position>
<position>user10</position>
<position>user11</position>
<position>user12</position>
<position>user13</position>
<position>footer</position>
<position>syndicate</position>
<position>debug</position>
</positions>
I manually added them.