Offensive Foul during FT

[so cal lurker]

Side track:

Scenario: out of control shooter releases ball before crashing into defender with LGP. After the foul by the shooter, the ball falls through the net.

IIRC, it used to be that we would count the basket but still charge the common foul, possibly resulting in bonus free throws. I thought that had changed. But exception (a) would seem to say that the ball does not become dead on the charge by the shooter. Could someone be so kind as to explain the application in that scenario.