Sorry, I entered the solution only a few minutes after I received the mail, that an error has been corrected. If I understand you right, I should have gotten then 200 points but I got only 150 points. I suppose that this is due to the fact, that the publishing time has not been adjusted to the time of correction of the error.
Beside this the order of solvers is not the same as it would have been without the error and even in the case of an appropriate time adjustment we would not have the same order of solvers as without error.
We had until now already many challenges with the same problem, namely that the correct answer has not been accepted after the publication (in my opinion too often). To avoid in the future all the trouble caused by such errors I would therefore suggest, that a short test should be made before the publication of a new challenge to confirm, that the correct answer will be accepted. I assume, that such a test will take only a few minutes of time but this time is well-invested.