Hello!
1. Plz provide access to test profile in your site. But don't forget that this stat relates to all site content, not only for activity of this user.

2. You can do it in mailbox (my mail section).

3. It was called by old browse.php system, which was directed to show 6 column area. Now you should delete this fragment from your browse.php -

if( $iI == 6 )
$cont = '<div class="browse_thumb_thin">';
else

Regards