I didnt think you could change these?
Not easy if it is Joomla core SEF. I couldn´t see if it was Joomla SEF or some other SEF extension.
What comment extension (plugin) you are using now?
You have in source code Joomlatune´s javascripts and some other comment extension´s javascripts.
Deactivate one of them.
Write a little bit more information.
Do you use Joomla cache? From "Configuration" and from cache plugin?
Do you use third party SEF extension? ACESEF, SH404SF? (more important)
If you use some other SEF extension delete all SEF cache every time you change something in Joomla admin panel. After that delete all Joomla cache.
I didn´t check source code before. Did you had
com_jaggyblog comments activated?