What I found out is that when I try to modify openigs in some furnitures, the opening that can be done are not realistic. For example, in 'chest', the drawers can be opened backwards: . This can't happen in real life. What sould be done is that the drawers must open only from the front side.
Also, the drawer seems to be out of the chest if you modify it way more: . The illustration is not realistic in Sweet Home 3D. What should be done in order to illustrate the modifyings realistic is that there must be some restrictions in opening and closing every drawer. This will prevent the problem of 'the flying drawers' as it is shown at the second picture.

These bugs can also be found in the 'glass door cabinet', in making a door with walls around it, and in many others.