Ok in short, a hack is a hack however you try and explain it away. Key words in his argument to you, "RANK HACK"
Secondly the IP's are from different countries over the world because he uses leaked keys. In fact alot of the STI/SS guys use leaked keys. However his IP has actually been the same from dec 08 until now, sept 21st 09 falls between these two dates, and the IP being used whilst the above ban was triggered is the same.