Why the steel at mid section of a beam the steel at top fiber is more than bottom fiber?

Sir, I'm a new user of stadd and I'm in learning process. Today I do a seismic  analysis of  a G+3 building . But I have some confusion at the output results as the area of steel at TOP FIBER is much more than the area of steel at BOTTOM FIBER (at mid section of a beam). So my confusion is Is it possible or my process of analyzing is wrong?? Thats all.