Iframes loading on bottom page redirect view to it

I have a customized template with dev-tools and inherit from Quark.
I needed add iframes for my association to permit visitors to become memberships.
It works and I have change some settings on admin security like disable Filters on Events and remove iframe from Dangerous HTML tags list. I know it not very nice, but I take the risk…
Now I have this little trouble, when the page is loading, or better say when the iframes finish loading, you are redirecting to them, and there are more on the bottom of the page…
Can I change this comportment ??

the page is situated here: www.linux07.fr