Log-ins from different state & changed password?

[Steve]

First thing, Is it on your recognized devices list ?

If so may be, the location is wrongly saved or something,

try revoking the access for all the devices in the "Recognized devices" under "Security Settings"

subscribe for mobile alerts so that you get notified of all logins and you will be able to monitor whether its only your PC that's recognized as txas or "others"

the login Notification settings on mobile are available under "Security Settings" too.

try naming your devices wherever you log-in from mobile, Tablet or computer with either your name or as something you can recognize so that under recognized devices you can differentiate

with these you can easily track your Facebook as well as keep it secure