If the inboard aileron drooped with flap selection and then returned to neutral once the flaps returned to the up position, it could have been a little glitch in the system. But i seem to remember when reading a B767 maintenance manual that {this could be for something else} if the pilot selects aileron trim whilst the A/P is engaged, the aileron does not return to its correct unit. It fly's out of sync so to speak. It only resets its self once A/P has been disconnected.
I could have this wrong.
An interesting one though orion1210.
c24