Price movements incorrectly shown
Looks like the price movement percentage after market open is calculated from the last after hours price. Very confusing. When markets open the price change should be calculated from the closing price of the previous day, not after hours trading.
The system should not work like that and I just checked some stocks which are properly showing change and % change. It is possible our data provider suffered some outage. If you see it again, please post a screenshot so we can investigate.