it's a double transform issue, which is weird because you said it's not parented. Did you do your freeze etc when it was parented to something else then unparent it? If so re-freeze and delete histoory. Worse comes to the worst because it's a simple obeject you could always export as an OBJ and then re-import it. That might fix it. But that's only as a last resort. You could also try going into the hypergraph and checking for any connections that shouldn't be there and delete them.

Or you can post the scene file for us to look at

A