So it's actually a normal tactic to break up flocks in the morning, at least. Naturally, in a perfect world we'd pattern turkeys perfectly and never have to do this, but some hunters do try to scatter the flock and then use their mouth call to make them believe the dominant female hen is trying to re-assemble them.
Granted it sounds like you did this in the evening. I do not know how turkeys react to this; hopefully they'll pick up where they left off and you'll punch your tag, next time.