错了should be accepted
Yes, make sure to report it.
Does this literally mean "not right"
for a second I thought that I somehow got the question incorrect without even answering it
Am I correct in thinking this literally translates to "not right"?
对 means "correct" or "right". They probably preferred "incorrect", because "right" can also be a direction, but it would not mean that.
i could not hear 不对
Don't forget that 不對的 is also correct since 對 here is an adjective. In addition, 的 does not have to include the noun.
不对 should be right