This 1918 home had the basement re-wired with 20 amp romex and they spliced inside junction boxes to older knob & tube wiring. The 1st & 2nd floor wiring is all older K & T. Isnt the older K & T 15 amps? Some of the splices are outside of the junction box.
I called out an electrician to review all older K & T and the connection points.
Also at the main panel the connection point of the ground wires appeard to be improper. Sloppy work at the nuetral & ground connections. Isnt that one nuetral improperly crossing the hot bus bar?