Yes, Marriott.com shows the lowest rate for the first night of a multi-night stay. Clicking on "Continue" then reveals the actual rates for various room types, including the "Total per room" for the entire multi-day stay.

But I would not characterize this as bogus or deceptive.

Sometimes the first night is higher than the rest of nights, such as Thursday night for a 3-night stay at a hotel with low Friday and Saturday rates.

When there's a combined reservation website for all 30 Marriott brands, let's hope Marriott figures out a way to give customers control in how rates are displayed.