I first downloaded the file from your uploaded link and file in post #3 above, and used File/Open open to get it into a new drawing.
When I R-clicked on it, and selected Dynamic Components, I got a blank Options window. Double click on the component to open for editing, and R-click on the centre of the door, and I get a non-blank Options window, but with only width and height options for the Raised Panel. So something definitely wrong there versus one’s initial expectations.
I next tried a direct download from the 3D warehouse, into a new drawing.
The component works as expected, open/closes with the Interact tool, and after saving, closing the SU window, and re-opening it directly by double clicking on the file, it again works properly on opening - I get the full range of options shown in your screen shots.
Opened an old drawing, Imported the component, R-click, and again no options. BUT this time, I had to explode the component once to remove the ‘outer’ component wrapper, and the Options all appear.
Change a few options, close the DC Options window, and reopen it - no problem, the options still all visible.
I wonder if you never removed the ‘outer wrapper’? If so, you would get the options if you first double clicked on the ‘wrapper’ component to get at the DC wrapped inside, then get the options when you R-click and select DC/Options.
If you then closed the component (completely) and closed the Options window, then R-click again having selected the component, and re-open the DC/Options window, you will get a blank options window.
I can’t get it to ‘misbehave’ as you describe.
Could it be as simple as you not have exploded the component after import? If it DOES import without a wrapper, this will wreck the Options. But if it HAS the wrapper component, then you need to explode it to get the Options to appear.
I know this baffled me the first few times I tried to use a pre-built DC, and also when I first saved one of my own. File Save As with the component selected, gives a different result from what you get when just saving the whole file.
The component you saved and uploaded definitely DOESN’T have the options you expect when you use File/Open. It looks as if it has been exploded once, and then wrapped in a blank component, not the original DC (it hasn’t been, but it has lost the link to its Options).
You MUST use File/Import to include the DC in a new model. If you just File/Open it, you lose the DC wrapper level.
Confused? So am I, a little. But the simple rule seems to be: IMPORT a DC to use it in a new or existing model, don’t Open it. If when you import it, you get an extra ‘wrapper’, explode it once, THEN you should get the options.
I haven’t found this explained clearly in tutorials or Help files - it probably is there somewhere, but it doesn’t seem obvious where, if I search for ‘Sketchup Dynamic Components Help’ or similar.