this is untrue when it comes to newer ASUS bios. they now automatically update with intel ME when you update the bios (if the bios needs a updated intel ME). its really convenient.
as to op. this is normal. software and even the bios doesnt ackownledge the different versions. if the number is the same than it will just show the number.
op do what the comment above me said or go to your motherboard manufacturer website and download the latest i225 ethernet controller driver from there.