Hi Nathan, yes you did score 150. If you check the maths I did add 150 points from your score after deducting 100 points (your stake unit) from your previous score. The mistake is from the wording, after pasting the original sentence, I forgot to change the details in this case how much you won.
You've got to accentuate the positive.
Eliminate the negative.
Latch on to the affirmative.
Don't mess with mister in between.