Often it is impossible to charge one enemy without charging another at the same time. Sometimes this can happen because the edge of a formation clips an enemy unit and engages it 'accidentally'. For example, consider the diagram below.

In this situation assume the charge has been redirected onto the new target which can make a normal charge response (ie, it can flee, stand and fire or hold). If the charger has already suffered stand and fire shooting from its original target then tough! The commander has misjudged and must pay the price.