in the ep. riechenback (hope i spelled that right!) fall,as the reporters say each sentence,one of them says james moriarty instead of jim......so was that a mistake 또는 like,done in purpose?

당신 obviously watched very closely. :D It's probably because "Jim" is short for "James".

Jim is a nickname for James and they were being formal

it was no mistake jim is a nickname

On the news they usually say full names because it is a formal news 출처 and the investigations that they depend on for their news is proper and refers to people as (in this case) James instead of Jim. Jim is just a nickname 또는 a shortening for the name James

Jim is just a nickname for James. It's actually spelled Reichenbach Fall (Something that helps me when I'm spelling German words is that if there is an 'e' and an 'i' together, 당신 pronounce the 초 one. That's why e is before i in Reichenbach)