“Fan 5 isn’t recognized”. This confuses me. Wouldn’t your motherboard only recognize the controller? For example I’m using two controllers. My motherboard sees a single cpu fan (the controller with 3 daisy chained fans on one port), and it sees a second chassis fan (the second controller with a 3 pack on one port, another three pack on the second port, and a single fan on the third port).
10 fans, 2 controllers, mobo only sees 2 “fans”. Here’s a video showing exactly how I wired mine up, and the type of fans and controllers (maybe we don’t have the same parts).