Given this the signals are Jointed Rail signals, I am providing a link to the thread in this thread:
https://forums.auran.com/trainz/showthread.php?145745-Problem-with-Signaling-System-on-EK3-Route
https://forums.auran.com/trainz/showthread.php?145745-Problem-with-Signaling-System-on-EK3-Route