Redirect on my website, when using a mobile device - Joomla! Forum - community, help and support

i hope 1 of guys can me out. started website: www.museum-riegel.de weeks ago.
i have never noticed strange thing going on on site.

but when using iphone or ipad, redirected. site clicking loading , when done, getting redirection. bemydate.mobi

if deactivate cookies on ipad, didnt noticed redirection.

if using desktop, browser, runs smoothly. dont know or error. suggestions?, ideas? checked webseite malware anything..even on google , says ok.

thx much!

try of tools here http://sixrevisions.com/tools/10-excell ... e-devices/
it mobile template comes dodgy place