I found some other issues.
1) This could be just me. Probably is, but in spite of selecting 'yes' for 'show hack on front-end' I'm not seeing the hacks listed in hacklog.php (see 1st attachment. There should be 15 hacks showing). I can view the hack in the admin CP but is more supposed to show than what I'm seeing (see 2nd attachment)?
2) You have an extra query for uncached templates. I'll try and locate it in a while. Note: I can see you've cached your custom templates. Excuse me while I try some debugging...
3) You don't have hacklog.php accounted for in Who's Online, resulting in the Unknown Location Syndrome.