Cultural differences, believe me as a Portuguese Interpreter I meet these situations all the time. I came to the conclusion it is the 'Portuguese' in all of us that get us in trouble, at times, innocent moves, just to please, or engage and boom - just back fires! Once, over the phone, the speaker after trying to get a real answer from the "Port. Speaker", finally had enough and said :"no wonder the Portuguese lost their Empire".... that is how I feel at times, my entire Empire is lost, due to not 'conforming' with rules I didn't even know existed.