I am having a very strange problem with one of my customer's sites. The original set up was fine, but recently, I am unsure when, the WordPress URL in the General Settings changed to a url that is actually one of that customers domains and that is mapped onto the main domain. My customer maintains that neither he nor the other person who has access to the administration area has made this change and I certainly haven't. After I asked them about it, I went in and it was back to the correct url, but now it has changed again. I'm really confused.
We can access the admin area by using the url that it's set to but I want to change it back so that all is correct. My questions are these:
1. Are there any repercussions to simply changing it to the correct url from within the admin area?
2. Could this possibly be a sign that he admin area has been hacked? I find it difficult to believe since the only change is to a domain owned by the site owner.
Many thanks for any light anyone can shed on this strange issue.