HTTPS website redirects to the main production site instead of the dev site

I have two sites: website.domain.com and domain.com. Both are physically on the same server. However the production site (domain.com) is enabled with HTTPS under Dashboard > Settings General. The website.domain.com has HTTP instead. Every time I enter “https://website.domain.com” in the browser, I get redirected to “https://domain.com”. Why is this? I’ve not set any .htaccess redirects neither are there any plugins doing this. I also checked the Apache configurations and there is nothing custom here. Here is what the access log and a curl command shows:

xxx.xxx.xxx.xxx - - [11/Jan/2016:19:44:02 +0530] "GET / HTTP/1.1" 301 527 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.106 Safari/537.36"
xxx.xxx.xxx.xxx - - [11/Jan/2016:19:44:02 +0530] "GET / HTTP/1.1" 200 50425 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.106 Safari/537.36"

curl -vvv https://website.domain.com/

* Hostname was NOT found in DNS cache
*   Trying xxx.xxx.xxx.xxx...
* Connected to website.domain.com (xxx.xxx.xxx.xxx) port 443 (#0)
* successfully set certificate verify locations:
*   CAfile: none
..
..
..
> GET / HTTP/1.1
> User-Agent: curl/7.35.0
> Host: website.domain.com
> Accept: */*
>
< HTTP/1.1 301 Moved Permanently
< Date: Mon, 11 Jan 2016 14:15:13 GMT
* Server Apache/2.4.16 (Ubuntu) is not blacklisted
< Server: Apache/2.4.16 (Ubuntu)
< Expires: Wed, 11 Jan 1984 05:00:00 GMT
< Cache-Control: no-cache, must-revalidate, max-age=0
< Pragma: no-cache
< Location: https://domain.com/
< Content-Length: 0
< Content-Type: text/html; charset=UTF-8
<
* Connection #0 to host website.domain.com left intact