A7 behaves a bit different in this.
If you build a level youre able to choose between Simple Map(ABT) and BSP Map - If you open the wmb file the level-geometry is rendered in the selected mode.
Entities dont use these render trees at all(at least i unterstood so) - so if you open an empty level with level_load(NULL) none of them are used because there is no level-geometry.
But i dont know the ent_type command at all and i cant find it in the manual.