I’m posting my last reply here, in case other clients have the same situation.
There are 2 instances of wpestate theme in your installation. You uploaded one in themes folder (like you should do) and another one in the actual theme folder. Because of that wordpress detects 2 set of templates and gets “confused” not knowing which is where.
My recommendation is to remove the wordpress install, clean the database and start over. If you do not clear the database some page id may remain in there and you may reach the same situation. Since you don’t have any content yet best case is to start from 0.
After you do this, please contact me to look over the Facebook Login. You should add in admin the Facebook app details, and then send me the link to check.
Looking forward to your email.