It's actually more the fact that 500AT wishes to be petty. He's been told several times that he made a mistake, and while he has admitted to his fault, he continues to try to correct people on such trivial information.
The author of this thread made no mistake when he said "P20/RM-130." We knew exactly what he meant, and it was completely unnecessary for him to be corrected. P-20, PN-20, PN20, RM130, RM-130, ACA, ASC...it's the exact same thing.
Unfortunately, some of us find it necessary to correct such trivial errors. I was simply satirizing the situation.