Oh my goodness.
Not to say that EVERYONE needs the support of a bike-knowledgeable retailer, but when the OFFICIAL product shot of your bicycle shows the stoker's handlebars installed backwards (in FRONT of the captain's seatpost) serious red flags go up.
I did a search on Sears' website to ensure that was still the picture they were using. Yup.
I hope you're comfortable doing all your own wrenching if you're considering that tandem.