Custom Menu Anchor Links Not Working

I've got anchor links in the nav menu of my site, and I can't get them to work properly. The site keeps prepending the siteurl before the anchor link. With the #rsvp anchor link, I've tried using the whole URL (http://communityengagement.nyc/#rsvp), putting it in single quotes ('#rsvp'), prepending a slash (/#rsvp) and still can't get it to work.

I dug into the php a bit to see if I could figure it out but I haven't had any luck.

Thanks, A