First, the problem was NOT due to Wayfair; it is due to the manufacturer. I am a former union carpenter--the kind of person friends/ family call when they need things assembled. I purchased two of these "Cubicals" by Closetmaid because I thought well of the company. I will never purchase another of their products. The first one went together just as it ought to. The second one had mis-aligned/ misdrilled holes that prevented the top piece from going together. I tried rearranging the "B" pieces--but, none of the "D" pieces worked with it.  I finally cobbed it together with same hi-thred screws I had on hand; but, the finished product is not up to my personal standards--it will due until I can find another company's product that looks enough like the one good one to work.