The following comes from a news article http://www.voanews.com/specialenglish/2008-02-21-voa2.cfm.

But in truth there were only three different wines, and two of them were presented twice, at a high price and a low price.
For example, the wine that in fact cost ninety dollars a bottle was presented half the time as a ten dollar wine.

I understand the red part implies that $90 wine was presented one time, and $10 twice. Is this right?
If yes, The last sentence comes a little wired or reads indirectly by my point of view.
Because the sentence preceding it says "two of them were presented twice,"
following this logic, I would expect the last sentence reads something like this: For example, the wine that in fact cost $10 a bottle was presented twice.

May I have any comments about this? Thank you.