Multisite creating a page in a subdomain site redirects to the main site

Everytime I am creating a new page on my subdomain site, then I view the page, I am redirected to the page of my main site and the subdomain url is appened in my main site url.

So example. My main site is http://site.com and my subdomain site is http://another.site.com

When I created a new page at http://another.site.com say Sample Page with a slug of sample-page , when I view the page, I am redirected to

http://ift.tt/1ysQ16V

What's wrong with this?

Your help would be greatly appeciated!

Thanks!