Are you using two different versions of Blender?

Looks like one of the script files is outdated. If restarting Blender doesn't fix this, delete C:\Users\thebl\AppData\Roaming\Blender Foundation\Blender\3.2\scripts\addons\io_scene_valvesource\ and reinstall.

Normal means that it's intended behaviour in the core Blender application. This has nothing to do with the Blender Source Tools, which doesn't handle deletion of objects or set fake users (except on import, for Actions).

This is normal. Deleting an object from the scene doesn't immediately remove it from Blender.

However, objects without users are not saved to the .blend file. You should find that the armature is gone after you reopen the file.

If this is not the case, then it still has a user, or has a fake user.

It sounds like your curve object isn't parented to anything. Try making it a child of the object that you are trying to align it with.

There is a "child of" or "copy transforms" constraint on an object in your scene which doesn't have a target. The constraint is broken, does nothing, and can be removed.

I'll avoid this error in the next version of the Source Tools.

There is invalid text somewhere in the file. Is it a binary file or text?

This object is created on import to help you diagnose VTA mismatches. You can delete it if you aren't using it.

You need to tick the box in the outliner next to the collection. "YellowBear" is excluded in the file that you uploaded.

These messages are because the collection that contains the object is excluded from the scene. I will change the exporter so that it doesn't try to export such objects.