I have exactly the same problem my friend
your configurations nginx's not good!
24 hours open ticket still no solutions!
I have to include a code in my config.php to fix this issue ..
purhased two of the netherlands vps 2-gig servers and both are unbelievably slow. The first only achieves avg. 3-4MB/s uploads through rtorrent and the 2nd can't even make it over 1MB/s. I talked to support about this and was told I need to order more ram , then asked how much is that and can it be added to the server and no reply back after 5 days.
Not renewing when the month is up and don't recommend this company at all
I'm not the bad pub to friends is very good hosting boxslots
This corrects the ereur by searching ..
I joined her in my config.php to solve the problem
$_SERVER["REMOTE_ADDR"] = ( isset($_SERVER["HTTP_X_REAL_IP"]) ? $_SERVER["HTTP_X_REAL_IP"] : $_SERVER["REMOTE_ADDR"] );
Your host use nginx as a reverse proxy for serving static content. They probably found some poorly auto installer that installed it without mod_rpaf so you see the same IP's for all members/visitors.