Yes, you read it right! I have this issue and my pre-lander is dead or something. Even after few days of usage my pre-lander is showing DECEPTIVE SITE AHEAD error. What's going on? Anyone ??
PS: I am running sweeps on google search traffic!
BUMP.... No one has any solution to this issue of mine? I am pretty sure, people running sweeps have had this issue before.
You already have a thread with pretty much the same topic here: https://stmforum.com/forum/showthrea...regarding-CTR-!, why start another one? 
Google flags many affiliate style landers, you're not alone. The only way to handle this is to develop a system to detect the flag early and then swap the domain. Did you look at some of the threads I linked for you in the other threads.
Erik should be able to provide some help here, I know he's been facing this problem some time ago. Let me tag him here: @erikgyepes