First off, I wanna go to your convention! Sounds awesome. I'm in Florida though, so it would be a bit of a trip
As to your issues... Facebook looks like it should work, but the app is still in sandbox mode, so I can't fully test. We treat Facebook a bit differently though, and I can see some issues with Instagram at least. However, I'm not sure exactly what. To determine the URL to redirect to, we use Joomla's built-in function:
That should return the root domain of your site. Generally, this is detected automatically. However, some SEF extensions or the $live_site setting in the configuration.php file can force this to another URL. My only guess is that something is forcing that URL to the live site, even while on dev, but I can't tell what from what I see so far.
To note, it is not a setting in your application. JFBConnect sets the redirection URL during the authentication process. Your applications just need to be setup to recognize it, but they are likely configured correctly, so I would not focus there.
Hopefully that gives you some ideas, but if not, let us know and we'll gladly help investigate further.
Thanks,
Alex
URI Redirect Errors - All Services
