Chris,
On the other hand, here are the same group of METARS from ADDS (Aviation Data Digital Service [USA]):
it depends a bit with the US data on foreign airports. First of all, they often are quite late and secondly, it depends strongly if they get properly propagated by the GTS system. Not always the case. I know of some applications which run off the US data, their METARS are always 1 behind due to the way the GTS input gets distributed into their cycle files of which ADDS and other applications are feeding. That way it can happen very well that COR's are not present.
Some other applications have the same problem. I've been fighting this end for e.g. GTS mauled messages to be still shown, particularly African TAF's which sometimes have whole sections in gobbledegook due to lousy datalines, but I'd rather have this TAF than none at all. But quite a few databases simply kill anything missing a character or two.
Best regards
AN2