Reviews are long-lived, that pricing info is probably out of date in a few months, but the review will live on for a while, and lead to confusion (Especially since, I assume your reviews were well written, giving them more credibility, and thus leading to more confusion)
There is also the problem of confusion over price of a product and its legal implications... if you go to a store that relies on box stickers for pricing, and the stickers only have a price, and there isa box there with a wrong (lower) price on it, the store has to sell it at that price in most states... im sure the law wouldnt kick in over a comment, but you cant blame amazon for guarding against the swarm of people who's sole purpose in life seems to be to get one over on other people