Welcome to the SBB Community.
We are a customer support forum run by volunteers, not the SBB customer service.
The website and the app are synced, provided you use the same username / password.
The Swiss Half Fare Card for tourists, however, is issued as a ticket. Therefore, the app does not recognise it automatically, as it is the case with travel cards used by residents. You therefore have to set the discount option manually; it is not a big deal as the app will remember your setting.
Please kindly note, politeness is important in our country; approaching someone without greeting might be understood as rude behaviour and people may refrain from offering help.
Kind regards,
Roland