You are correct. The conclusion is the same though!
LLS
Some conclusions are the same. Others are different.
BTW, keep in mind that this isn't the only poke at the GISS data. Much of the GISS "raw" data is data from the USHCN that has already been adjusted. Exactly how much is from that source we can't tell because they don't say.
This revelation of the GISS error came about from examination (still ongoing) of how frequently the USHCN networks sites differed from NOAA standards - especially given that this was a specially selected network advertised as "high quality", and which is used as a "control" for many studies.
For example, it appears that some of the sites sitting next to asphalt have been used as rural sites to demonstrate that urban sites aren't warming much faster than rural ones.