1. Some presets will cause the LEDs to flash between the 2. This is OK.
2. Remote LED will be caused by frequency, waveform, and amplitude and so on. When frequency below 30Hz, the LED will be flashing. Please check below link for How Does Spooky Remote Light: https://www.spooky2-mall.com/blog/how-does-spooky-remote-light/
For more details, please check the link: