One doctor referred to my UC as pancolitis, but my others doctors don't use the term. What I know is my whole colon can be inflamed, or sometimes it is found to be only inflamed in certain areas.
Maybe I'm missing something, but what difference does it make what it is graded?
Either you are flaring and need more aggressive treatment to get it under control, or you are not and need to be on a maintenance regimen (whether that is diet, drugs, etc.).
Seems you are both experiencing the latter...that's good!