i too ordered one of these "deals" - the internet page boasted about the buy-one-get-one free so i ordered two.
after all the questions of do i want to buy this or buy that, to which i always said 'no', the site gave me a confirmation page showing my total charges of $71 !
i called to try to rectify the problem the following monday (i purchased on a saturday) and the gentleman said it was too late to cancel and that my order was already processed but i could refuse delivery and they would be sent back.
if i do that, i'm out $30 (roughly) since they charge $15 EACH for shipping and i would have nothing.
i'm happy to comment here - and my next letter is to the BBB to describe how they cheat you into false purchases.
i know these can be bought at home depot - i haven't found them at lowes yet, but if you are going to buy one, DONT BUY IT FROM THEIR WEBSITE!