Unable to publish ad - takes user to domain away from my website

I set up a trial user account on my BuddyPress site. When I go to create an ad on my site http://www.idahofallsnow.com I can make it as far as 'Save Changes', and then when it almost looks like it's going to be successful, the user is re-routed to this url: http://www.loveandlightmarketing.com/classifieds/my-classifieds/

And then, I get a 404 error repeatedly. Any suggestions on how to fix this in my settings somehow?