I think the TIE fighter bit from the opening sequence is just a matter of the perspective shifting, not an actual continuity error.
I agree, i also think that the hanger “extending into space” is down to an exaggerated angle of perspective. Form what i can tell the platform is raised and it looks like the hanger has two floors but at the same time there is no sign of this in the official cut away diagrams, either way i think ady will be making a miniature to replace the terrible mat painting behind lando and han so he may come across the solution when he does.