Hey guys,
I made a companion NPC and put her in Victor's Shack. She is standing in front of the bathroom so there are no objects obstructing her and she is placed on the floor inside the GECK. HOWEVER, when I go there in the game, she is not in the cell. I cannot see her. I often had this same problem in Oblivion. Can anyone tell me how to fix this? She is in the cell in TESnip too. I made sure the GRUP Cell is at the bottom of the list. I have tried this in several locations (Prospector Saloon, Doc Mitchell's house, a modded house etc) but she still doesn't show up.

Hmmm, that is odd, have you tried putting down a Xmarker and reference the Companion to it?

You probably have an AI package on the NPC which is telling them to 'be somewhere else'. Remove them.