Stop changing from 3rd to 1st person

I don’t like how it suddenly changes from third to first person in the file I’ve been using in third. That’s a bother. Also, using different names when it should be up to date on what characters are in the file. Doesn’t make a bit of sense to me. I’ve talked about head hopping too and was told by someone at Sudowrite that it wasn’t changing POVs, it was showing her perspective when it was in his POV. That makes no sense. Perspective is POV and you shouldn’t have both in one’s POV.