Yeah, but that won't be happening next phase. They may all gain one Effectiveness though, so it'd be 16/37 {39/39} post the Main Raise Army unless we unhook one. And we can't take a Secondary Raise Army next update, because we can't split reaction actions, though if we could instead of a Main we would be safe.
Sometime, AN split reactions into secondaries for a choice, so it isn't impossible. (sec raise army, sec found march)
Actually, I think they'll be at 30 Martial, not 24. On the stat page, their effectiveness is out of 10, not 8.
You may be right, though I never see a 10/10 strength for Banner Companies unless they were just recently raised.