I'm working on a model of a room in Maya 8.5 with many different child nodes, such as stoves, fridges, counters, etc. I have one parent scene containing the walls and floor of the room directly in the file, and various other files were placed into the scene using the "File > Create Reference" command.

Once the referenced scenes are imported, I place them within the scene where necessary. When possible, I freeze transformations of the child nodes so they will be easy to return to their location if they accidentally get moved.

Here's the problem: when I save and reload the parent scene, most (but not all) of the geometry of the child nodes are reset to the origin, where they were first loaded in. The weird part, though, is that the pivot of each of these child nodes is located correctly, exactly where I placed the models in the scene before I saved it. So every time I reload the scene, I end up having to replace everything, and it's wasting a lot of time and causing incredible frustration.

For some reason, I have three models that don't have this problem. There is a swinging door, a window, and a sliding door, none of which reset themselves when the parent scene is reloaded. As far as I know, I did nothing different when referencing these models, nor is there any major difference in the structure of the child scenes.

So I guess my question is, does anyone else have this problem? Is there a solution? Am I doing something wrong? I'm fairly new to using the reference node workflow, and I love the concept, but it's killing me on this project right now.

I've attached an image to help explain the problem.