When you import a nif and there is already an object in your blender file with the name of a node in the nif, the existing object will receive the animations instead of the object created from importing the nif.
To reproduce:
- Start with an empty file
- Create a cube object named "Lid"
- Import Skyrim mesh meshes\clutter\containers\chest01\chest01.nif
The animation for the lid opening and closing will be wrongly assigned to the cube named "Lid" instead of the "Lid" node object of the chest you imported.
No pre-existing "Lid" object = animation assigned correctly

With pre-existing "Lid" object = animation assigned incorrectly

chest01.zip
When you import a nif and there is already an object in your blender file with the name of a node in the nif, the existing object will receive the animations instead of the object created from importing the nif.
To reproduce:
The animation for the lid opening and closing will be wrongly assigned to the cube named "Lid" instead of the "Lid" node object of the chest you imported.
No pre-existing "Lid" object = animation assigned correctly

With pre-existing "Lid" object = animation assigned incorrectly

chest01.zip