I am having the same issue. I added a new domain to my server, and the site caused my other site to go back to the default index file. How do I fix this? I am a complete noob to linux. So please be as thorough as possible?
The sites are drewclardy.info. This one worked fine until I added the new site last night.
Other site is
www.clardyfamily.co.cc. It is also pointing to the new site page.