Question on SS/PS Chapter 7

[KathyK]

No: HPFGUIDX 85695

Hello Everyone,

My bleary eyes can take no more searching through old posts to see 
if this has been brought up before, so I'm going to just ask you all.

On p 122 of the US Paperback Edition of SS:

"And now there were only three people left to be sorted."

*****
Dean Thomas and Lisa Turpin are sorted after this statement.  Next 
Ron becomes a Gryffindor.  And *then* Blaise Zabini becomes a 
Slytherin.  

If I'm not mistaken that's four, not three.

Is this a Flint, or maybe it was meant to say there were three left 
other than Ron to be sorted?  Maybe no one matters to Harry after 
Ron, so Blaise Zabini doesn't count?

I know it's a minor point, but there it is,

KathyK, who needs to stop staring at her computer screen now