There is only 1 model for the door, which is used for both the top half and the bottom half.

Unless the door model you want to make is the same thing stacked on itself, the ability to specify a model is useless. You can't (for instance) create a door that looks like it does now, only with the "window" being modeled (rather than just a transparent section, which was what I was trying to do).

The door model should be made like the bed, where there are 2 models (1 for each section) rather 1 model used for both sections.