Yes, it looks like your template override has the following block of code twice, which is why you're seeing the double widgets, since you're using the Bottom position setting. Remove one and I believe that will fix your problem easily.
<!-- Plugins: AfterDisplay -->
<?php echo $this->item->event->AfterDisplayContent; ?>
<!-- K2 Plugins: K2AfterDisplay -->
<?php echo $this->item->event->K2AfterDisplayContent; ?>
Please note, that I found another plugin event that was duplicated as well in your template override. If you change the position of the Comments or Share buttons in JFBConnect > Social, you may run into this problem again unless you remove the duplicates
$this->item->event->BeforeDisplayContent;
In general, if you are having problems, compare your template override item.php with K2's file at /components/com_k2/templates/default/item.php to see any glaring or obvious problems.
-Melissa
double social buttons & comments box in K2 items
