Looks to me as if the only 18-125 SIgmas that B&H has are returned copies. And the most benign story they had to offer you was what they said - they were order mistakes. Yeah... like as if I ordered a platic fantastic 50mm f1.8 and they sent me a 200mm f1.8 I would retrun it. Or vice versa. I think they knew exactly what they were doing... or at least someone did know. I think this just shows they have two copies of the lens that were dogs of some sort. Maybe these are samples that keep missing focus

or they might have other "issues".
NOW... I think that it is common knowledge that many models of lense from almost every manufacturer. SO this is NOT a SIGMA 18-125 thing... even though Photozones' test unit had a focus "issue". OK... OK... I'll lay off.
At this point I think you are within your rights to call and politely speak to a manager. A real manager. And convey that you are moderately disappointed and surprised in light of the otherwise amazing reputation that B&H had. AND that you've shared your amazing story of dissappointment on-line here and elsewhere in digital SLR forums. AND... you were wondering what sort of assurances you'll have that B&H will make this "right". SO you'd be fishing for some sort of courtesy... like maybe a partial refund or free filter.... or at least a free pack of lense tissue.

WHo knows.... maybe they'll do something really nice for you to make it right! Like with Kelly and her Gary fong LS2... if I read it right she got it (late) and they refunded her 100%... so ended up with it for free. NOW - in your case I don't know that they'd do it free - but maybe they'd let you keep the open box one free or for half price or something?
I once ordered a $250 b aby stroller on-line and they sent me 2. I was feeling honorable and had no use for the 2nd one - so I called them to tell them I got two. They confirmed I had not been billed twice and politely informed me to keep the 2nd one at no cost! Amazing.
I do believe my situation differs though in that supposedly I read recently that if you get the wring item in the mail from a retailor you are entitled to keep it FREE - according to US consumer trade law. SO - my free 2nd stroller fell into a crack where the retailor HAD to give it to me free - even though I offerred to send it back IF they paid for shipping charges. WHich I did reassert (after they offerred it free to me). And they reaffirmed that I could and should just keep it. Amazing.
SO give a manager a call. In so may ways you may have been sent an item incorrectly and maybe you are really entitled to keep it free?
And if this becomes the case - and "I" am the primary reason you got to keep it free - then I'll accept a crisp $1 bill as my consultation fee in full in the matter!
