Random domains pointing to my hosting; WordPress URL setting randomly changes

So two domains are pointing to my host/IP, I know there’s nothing wrong with this and not much I can do, however the “URL” setting in wordpress keeps changing to one of them, and I’m fairly technical and have been looking at all sorts of logs on my server and there is simply no one else who has changed this setting, I’ve even set up tracking the setting in the database and when it changed again the tracking reported nothing (yet did when I changed it in the DB & via WordPress)

I’m just sort of at a loss here, I cannot figure out why this is happening, no random files are laying around, my permissions are secure and literally every log (apache, ssh, ftp, mysql) is reporting nothing…

My domain/hosting: http://www.coretech-hosting.com
The domain that is pointing to my IP & appears in my settings: http://www.ae23.info (the interesting thing about this one is it’s also on GoDaddy, but this still shouldn’t affect the fact it changes in my WP settings.)
Just another random domain pointing to my IP: http://www.hotclan.pl