when I request a long box truck, why do you show me short box trucks?

Probably because the people who put the ad up checked the wrong box.

Yes, VERY frustrating. I am looking for an F250 Crew LB. To answer, 'professional car salesmen' are generally not very knowledgeable. I was looking at a listing and was not 100% sure as the pic was from front left and so I asked. Here is the answer: 'Gee, I am not sure how they measure these things but it is 7 feet from front outside edge to back outside edge.' This was a listing at a Ford dealer. :) Wow!