I don't have much to add here - and honestly I don't know exactly how administrative details usually work out in such a situation. For what its worth, if you signed a licensing agreement that specifies that they will file a PPA for an invention, I believe that generally would be akin to assigning power of attorney. But I am not completely sure.
On the subject of false information on a patent application - they have every motivation in the world to list you as an inventor if you contributed in any way to the invention disclosed in the application. If they don't do this - the patent will not be valid in a court of law should they ever try and/or need to enforce it (although if you don't come forward with evidence that you were an inventor, maybe that doesn't matter, but if you're collecting royalty checks...).
As far as naming company employees as inventors - it would be illegal to name anybody as an inventor if they did not contribute to the invention disclosed in the patent application. However, if any individual at the company ever decided to add even the tiniest detail to the invention(s) disclosed within the application, the company would be legally bound to list that employee (or owner for that matter), as an inventor as well.