Automatically Sorting a referenced sheet

I have a dorm roster on one sheet and the other sheet is an Alpha Roster. I want it to automatically sort alphabetically (column B) . Any time I change the roster, the Alpha Roster sheet doesn't automatically sort, I have to hilight and re-sort it again.

I updated the file, there are 4 tabs at the bottom. 1st Floor, 2nd Floor, and 3rd Floor. I want to have all the names, room numbers, and phases (ph) in alphabetical order on the Alpha roster tab. And when ever I make changes to one of the Floors, it will automatically update it the Alpha Roster.