It is not just Aloxi. Look at Fragmin and Dacogen! The normal process of calculating goals was used. Taking six months of sales dividing by two and factoring in a growth percentage. With the new quarter starting in December there were more recent months to be looked at to calculate the goals for Q4. Thus an increase in goal for those who were experiencing good growth over the spring and summer and a decrease in goal for those who were tanking over the summer. Thus rewarding those who underperformed and hurting those who outperformed.
Either way this could have been communicated and explained better. Most companies would just finish out the quarter with the goals that were given and roll the Halaven sales into Q1 as extra sales. But then again other companies would have a much better launch incentive plan were you can make real big money if you blow out your target. Not points.
Retro changes after the fact never make people happy. Especially when it can hit their wallet. They probably though it would not be noticed by releasing goals while everyone was at POA. This should have been communicated when the December goal came out.