Ron Weasley & His Brothers

[Alexander]

No: HPFGUIDX 33611

  Greetings!

  While rereading Philosopher's Stone, I have stumbled upon
some phrase which I think needs some checking. There has
been a lot of talk in the newsgroup about Ron Weasley being
the seventh son, and about a possible Ron's older brother.
Yet while I was reading SS6 ("Platform 9 3/4") Ron says that
he is *sixth* son in the family.
  I'm reading a translation, so just want to be sure - can
anyone check that up? I mean is it so in original English
book, or maybe in American version, or maybe it's a mistake
of translation into Russian?
  Thanks in advance.

Sincerely yours,
Alexander Lomski,
(Gryffindor/Slytherin crossbreed),
always happy to throw weird ideas into the community.