Were theya sales team member of Windows 10 or just JL staff wearing promotional shirt?
Looks like a trip to JL to see these shirts is in order!
They'll be a field marketing agency, and in my experience they can have a very mixed level of knowledge.
Some will be genuinely interested in what they're 'selling' that day and have gone beyond the call of duty on the initial training/briefing. Or others will be like the 'Samsung' guy who I saw a fair bit at John Lewis in Welwyn Garden City who appeared to answer questions by looking at the card next to the products, before later admitting that he didn't know much about Android as he used an iPad.
I did think it rather odd that he was there to try and promote Samsung tablets, but would have probably steered more people towards Apple.
Or maybe he was actually being paid to be there by Apple and
that was the plan all along!