Base plate: Mstrip & Beff

I am calculating base plate for tension 900 kn.I am providing 6 nos AB C/C both direction @ 150mm c/c. And column size is W-600X10,Flange-350X16,For this tensoin per AB is 150 kn.and moment arm

(AB c/c-web th)/2 .i.e (150-10)/2=70 mm,and moment becomes 0.15X70=10.5kN*m, and beff becomes 140mm. which matches exactly with ram connection calculation.

which you can see in the above image.

But while I am providing AB c/c 200mm in one direction keeping 150mm c/c in longitudinal direction the calculation doesn't match.100 mm from web center line both side.As per this situation moment arm should be (200-10)/2=95 mm,and moment should be 0.15X95=14.25kN*m, and beff should be 190mm. But ram connection calculates other.

  1.Base plate tension.rar

Here .rcnx file also attached.Why for second option Moment and Beff does not match ?