2. As far as I know, the former belongs to the Tourism College, which is located in Zhuhai Campus; The latter belongs to the School of Management, which is located in the campus of University Town. But the professional names in the annual enrollment plan are not necessarily the same. You'd better ask the admissions office.
3. If I remember correctly, the enrollment of the School of Management is now called "Business Administration", and the college entrance examination enrollment of the whole school of management should only have two majors: "Business Administration" and "Tourism Management 2+2". General tourism management has been included in the category of "business administration", and it will be divided when the majors are subdivided in junior year. And "Tourism Management 2+2" is what you said about going to America. You will take classes in CUHK for the first two years and in America for the next two years. The tuition fee for general tourism management, like other majors, is more than 6 thousand a year. I don't know about 2+2, but it is at least from 2000 to 3 1000 in China, and it seems to be 10+ 1000 abroad.
Page (abbreviation of page) I come from the School of Management. I answered the above information according to the situation of 12 and 13. I wonder if it will change this year. If you are not sure, you can ask the admissions office or the CUHK senior group for advice.