transformPointsForward and fitgeotrans don't seem to agree

I know this must be something I don't understand but I expected that if if generate a transform using fitgeotrans that I can then translate the moving points and I would get the fixed points. In my code the moving points are the corners of an image that is skewed and scaled and the fixed point the corners of the original image. When I used imwarp on the skewed image I get a perfectly rectangular result but translating the corner points gives me a rombus.

movingPoints = [-5 764;11 6;1069 753;1084 -5];
fixedPoints  = [ 1 884;1  1;1161 884;1161  1];

tformGeo     = fitgeotrans(movingPoints,fixedPoints,'affine');

translated   = transformPointsForward(tformGeo,movingPoints(:,1),movingPoints(:,2))

movingPoints-translated

Answer 1

[Kurt Lanes]

probably should include the results:

translated =

1.0e+03 *

0.0007

0.0013

1.1613

1.1607

ans =

1.0e+03 *

-0.0057 0.7633

0.0097 0.0047

-0.0923 -0.4083

-0.0767 -1.1657