Just joined your site and have been looking into your records on Northern Ireland players, and have been comparing them to my own and other sources on the internet, i have uncovered a number of errors as listed below:-
The total number of FIFA matches for them is incorrect there is a game in 1979 in which Chris has been mistaken for Jimmy.
There is an appearance in 1972 missing.
There is a game against Israel on 3-3-76 were he is incorrectly listed as having played and scored.
There is a sub appearance missing for 1980, it is from one of the Australia friendlies on the 11th June or 18th June. Source
There is a sub appearance in 1980 which is not correct, i think it is probably a mix up with the extra sub appearance Bryan Hamilton was awarded in one of the Australia friendlies.
The missing appearance is against England on 18/02/1882, this is the game that makes Sam Johnston Northern Ireland's youngest ever player.
The two missing appearances are his first two games for NI in 1972, a start against Spain on 16/02/1972 and a sub appearance against Scotland on 20/05/1972.
The two missing appearances are his first two games for NI in 1972, a start and a goal against Spain on 16/02/1972 and a sub appearance against Bulgaria on 18/10/1972.
These are the errors i have uncovered so far, if i find anything else i will post them.