{{{Strix}}} I hope that you're able to find help.
On that homework question, I figured out that the computer system wouldn't let me add points to everyone's grade (or, at least, not efficiently -- it would take about three hours, and I'm not going to do that for something that will make zero difference in anyone's grade), but it would let me easily subtract points from the total value of the assignment. So, the assignment is now worth 44 points instead of 46, and so anyone who got those two questions wrong because of the stupid WebAssign issues now has a 100% on the assignment.