So I'm testing
Using LiquidWeb as host which I believe it to be a decent one so click loss should probably be coming from somewhere else
You are self-hosting, so you have to consider what is the geo location of your server and what is the location of the traffic you're buying
That's too high of a percentage. Everyone deals with click loss (around 10%), but anything more than 15-20% is worrying. Something isn't right here. AdsBridge functions with Facebook as a traffic source, and even ahve a guide specifically for it. http://news.Adsbridge.com/fb-advertising/
Maybe this will help!
-Alex