The sell function incorrectly adjusts the payoutsTo_ by subtracting profitPerShare_ * _amountOfTokens + (_taxedeth * magnitude), which should only subtract profitPerShare_ * _amountOfTokens. This error causes users' dividend calculations to be incorrect, potentially leading to negative payouts or loss of owed dividends.
Modify the payout adjustment to only subtract profitPerShare_ * _amountOfTokens:
int256 _updatedPayouts = (int256)(profitPerShare_ * _amountOfTokens);
payoutsTo_[_customerAddress] -= _updatedPayouts;
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