Gateway Time-out failure after using multicity dropdown

Hi support team,

I am using a multisite installation with • RAM 109,5/64M • SQL 167 • PHPv 5.4.39 • wordpress Version 4.2.2 • GD child theme + buddypress multisite activated

1. When I change location by dropdown usage (> city = Leipzig) it is not really efficient
a. there is a missing “/” in url (http://gd.worldcheckin.com/locationgermany/saxony/leipzig/) after clicking “Leipzig”
should be http://gd.worldcheckin.com/location/germany/saxony/leipzig/
b. it takes really a long time to find the city Leipzig within dropdown
c. sometimes it brings no positive results
d. Instead of city Leipzig shown on map I am getting a browser message –
Epic 404 – Article Not Found

2. If I then use everywhere to go back and again try using city leipzig
then I am getting again an browser message
Gateway Time-out

Regards,
Alex