Each class has roughly 4 sections (day classes) for example a1 a2 a3 a4. Although one professor is listed next to your specific professor they are only one part of the whole thing. Each class (a1234) share two lead professors for lecture and more or less everything you do (handing in assignments tracking progress ect) there are additional professors that come in on you lab days typically and will remain consistent throughout the semester (as well as one or both of the lead professors). Clinical groups are done by section a1 is one group a2 another a3, a4 and two of them are those two lead professors and the other two are adjunct clinical professors. You will start with one on a particular unit and eventually rotate through to different units with different faculty. Don't sweat who might be listed for your courses and hospital sections because you will see a multitude of professors during each semester at various facility's and on various units.