I am concerned as I note from the logs - that the above url is continually appearing. On checking the url I see that it is a carbon copy of the website... is this hacked?
Please advise soonest
Someone cloned the website, but doesn't means it's hacked. There are ton of tools to clone a website. You should add the IP to blacklist (and maybe also to the .htaccess) to forbid its access to your site.