Many turn out tracks (switches) use control rails that need to be isolated with plastic/fiber track pins. This is all very well laid out in the user manuals and service guides:
See printed pages 26-28 for the O22 and 1122 style:
https://ogrforum.ogaugerr.com/...sories%20%201954.pdf
Reiterated in the modern tubular switches:
https://www.lionelsupport.com/...ents/70-5121-250.pdf
https://www.lionelsupport.com/...ents/71-4062-250.pdf
Fastrack switches have the control rails embedded and internally insulated. No need for special pins.
Bottom line, there isn't an electrical incompatibility with placing switches together provided you accommodate the requisite fiber pins for those switches that have control rails at the track junction.
Also, your experience with the 1122 style switches heating up and throwing themselves clearly are symptoms of not having the control rails insulated with the fiber/plastic pins. As such, they are continually activated , generate heat, and can actually melt/burn to the point of self-destruction. This can also happen if you use an improper throw switch, it gets stuck, or you park a train on the control rail.
