You don't seem to be making much sense here. It's not
an absolute i.e; rate monastery member Bar on a scale from
one to ten. It's an open-ended scale like temperature.
At one point we thought ice through boiling water was all
you needed, later one realized that there was much more
outside of that; you have ice and then you have Antarctica,
there's boiling water and then there's volcanoes and stars.
It's not "a random bumping downward" and you might just
also go up a notch (on the numbered scale). In any event
the number of XP you possess won't change.
I'm not belgian but I play one on TV.