ADS1015 with multiple alerts

I have set up the ADS1015 to read 4 single-ended inputs, including programming each as a comparator.  However, I cannot understand how, or even if it is possible, to permit EACH comparator to trigger the one ALERT pin.  If I program AIN0 as a comparator, with the resulting ALERT line behaving properly, I cannot likewise program AIN1 as a comparator controlling the ALERT line without disabling AIN0 from triggering the ALERT.  Said another way, with 4 channels but only 1 ALERT, it would appear that the ADS1015 can be programmed to have the ALERT respond to but one input channel, is that correct?