This is a common problem when using secure DNS services, they all have high false positives.
The main reason that I will not use them, in the past just about all of them flagged by own website as infected when it is perfectly clean and don't even host any files on my site and the codes used are from Jcink (a trusted free forum software based on Invision Power Board).
My recommendation is do NOT use secure DNS services, most of them have privacy risks.
Enjoy!!
