by Guido Roessling.
That's the strange thing. I am the only teacher in this course, so there is no "someone".
The assignment was set to a 15 point maximum when I last graded.
Today, I changed the activity completion to "on" and chose "must see" and "must receive grade". I certainly did not manually edit the maximum number of points (100% sure of that!).
When grading the next submission sometime later, I saw that the participants now had "15/100" instead of "15/15". I will try to experiment a bit if I can provoke/simulate the same behaviour again...