No, I mean that when you enter a chord on your keyboard, you can potentially get up to 4 possibilities for what you played.
From the user manual:
Enter Chords Using a MIDI Controller Keyboard
If you have a MIDI controller keyboard, you can use it to enter chords into Band-in-a-Box.
1. Play a chord on your MIDI keyboard, and then type Ctrl+Enter. The chord will be entered into the Chord Sheet at the current highlight cell position.
2. Another method allows you to choose alternate chords. From the Window | MIDI Chord Detection menu item, you will see this window:
When you play chords, Band-in-a-Box shows you the chord name and suggests alternates that you can choose from. Typing Ctrl+Enter enters the first selection and advances the highlight cell by ½ bar. To place an alternate chord in the Chord Sheet, click on the "Enter" button beside the chord you want.
I would suggest entering a feature request on the wish list if you wish to have it automatically enter the chords if you use method 1. And I suspect the reason they don't already do it is because you are probably the first one to request it.
And see image below: