I also worry about it. Even if the school is wrong, withdrawing my decision will also have negative influence on me.
I checked with other schools, one is very likily to give me an offer, and another is arranging an interview on March 19. A school asked me whether I'm facing deadlines from other schools. Some other schools say they are still reviewing.
So I'm thinking about asking this school to extend the deadline to the end of this month. Is it appropriate? If yes, how could I say?