Question for the constraints input

[raob94]

I puzzle why it appears two different objective values (90.9901 for the first and 98.1818 for the second) when running the following two codes.? the difference is only that the '+' in the first constrained condition is writing in the different place.

clear;clc;
x=sdpvar(2,1);
z=sdpvar(2,2,'full');
u=sdpvar(2,2,'full');
obj=[8,12]*x;
feas=[[10 20]*x+[1 2]*u(:,1)+...
      2.4477*norm([z(1,1);2*z(2,1)],2)<=140;...
      
      x+z(:,1)<=u(:,1);x+z(:,1)>=-u(:,1);...
      [6 8]*x+[0.6 0.8]*u(:,2)+...
      2.4477*norm([0.6*z(1,2);0.8*z(2,2)],2)<=72;...
      x+z(:,2)<=u(:,2);x+z(:,2)>=-u(:,2);...
      x>=0];
options=sdpsettings('solver','mosek');
optimize(feas,-obj,options)
value(obj)

clear;clc;
x=sdpvar(2,1);
z=sdpvar(2,2,'full');
u=sdpvar(2,2,'full');
obj=[8,12]*x;
feas=[[10 20]*x+[1 2]*u(:,1)...
        +2.4477*norm([z(1,1);2*z(2,1)],2)<=140;...
      
      x+z(:,1)<=u(:,1);x+z(:,1)>=-u(:,1);...
      [6 8]*x+[0.6 0.8]*u(:,2)+...
      2.4477*norm([0.6*z(1,2);0.8*z(2,2)],2)<=72;...
      x+z(:,2)<=u(:,2);x+z(:,2)>=-u(:,2);...
      x>=0];
options=sdpsettings('solver','mosek');
optimize(feas,-obj,options)
value(obj)

[johanlofberg]

Try

u=1;
[1+u(1)...
        +1]

[1+u(1)+...
        1]