Ethics Q – related to trading

Regarding one IPO subscription. Some accounts received shares they shouldn’t have and others didn’t receive shares they should have. The Manager is trying to correct the trades on pro-rata basis. Are the actions below True or false: (i) Credit short-term interest back to the accounts that should not have received the shares And (ii) Subtract interest from the accounts that should have received the shares. Answer reckon under (ii) the interest shouldn’t be subtracted. Why? Those investors shouldn’t have earned the interest had the allocation been correct initially… The only reason might be the mistake was made by the manager in the first place.