That's what I thought and it's a shame as I was going to trust them with some bespoke shirt making. Most of their shirts have been pretty good, whilst not T&A, I've been debating whether to ditch RTW T&A and go bespoke with this tailors. Now I'm not so sure.
I've worn the shirt twice, which means after the first wash the mother-in-law, who does my ironing would have spotted it. So I don't think it was there when bought, but I certainly haven't caught it on anything.
Most dress shirts will have one or two buttons on each cuff. A few will have three, but I tend to think that makes the cuff look too busy and it also makes it longer, too.
Most jackets will have four buttons. However, some older jackets will only have one, or two buttons and there are some brands (or some people who have had jackets made to order) that have imitated that look and only put one or two buttons on each sleeve.