I have a number of domains pointing to my main site through my hosting company. I had thought that it was via 301 redirect but now I am not so sure. In the address bar when entering one of my alternative domains the address bar shows that domain rather than my main domain. Then as you navigate around the site it shows alternativename/aboutus.html for example instead of maindomain/aboutus.html. I this going to cause problems with Google and co?