|It's entirely possible your computers have trojan's on them. Are you running antivirus software on them? Are you running antimalware like Malwarebytes on them?|
If not, you should be and will need to sweep all of your computers for both.
If you suspect you've been compromised, I would get the MAC address from each and every device in your home that connects to your LAN and I would then enable the "allow the following MAC's only to connect" feature of your router and I would put all those addresses in there.
I would also change the admin password and encryption key once you know your systems are clean of all trojan's, viruses, and/or malware.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.