I have been trying everything I have found under Troubleshooting, but nothing has worked.
Yes, I think I understand that my (multi-loop) theme's custom query is probably somehow messing with the Navigation links (which simply go back to the very same posts when clicked), but I have tried all the suggested "fixes" to the code, to no avail.
Have tried http://www.ericmmartin.com/conditional-pagepost-navigation-links-in-wordpress-redux/
also to no avail.
Have installed Pagebar Plug-in and... NOTHING.
My index.php is here--> http://pastebin.com/m7dbb453
I would greatly appreciate some help. Thank you.