Based on the answers provided, here are the corrections needed for the 3D object:

1. The rectangles need to be repositioned so that they are located along the horizontal centerline of the square. Currently, they are aligned more towards the outer edges.

2. The proportions of the rectangles need to be adjusted so that their height is twice their width. This is currently unclear from the images provided.

3. The depth of the extrusion needs to be clarified and potentially adjusted. It's currently unclear whether the object has been extruded to a small depth.