3 Unknown camers showing as "Live"

[Heybaby]

]NVR 4108e-a2. Hardwired only. Never connected to router.

Very strange issues over the past several years. Often when listening to playback early morning 1am - 3am I can hear people talking, laughing and moving a chair across a woid floor. Its not just me hearing it, my son and wife also hear rhe same. Slamming metal doors, snickering and whispering.

Last week we could hear busy city traffic and a "worrbling" office phone. Not something I've ever heard in the USA. I'm 68yrs. Again the nvr has NEVER been hooked to internet or router. Several factory resets, camera resets also. Running Cat6 solid copper wire. We lived in a small kansas town. Traffic on our street is maybe 5 cars. Neighbors, mostly older folks 50 yards away.

We just deal with it. 7 cameras are the Amcrest turret style and 1 is a dome with no audio on the porch. My son said to post a photo of the NVR screen from today. Says we have 3 extra cameras that say "Live". Dont know if it is related to our other issues. NVR only has 8 ports. All cameras are hardwired direct. Google Photos link shows the 3 extra "LIVE".
https://photos.app.goo.gl/9pmEyJJQ2dAFNzop8

Advice appreciated.