I see. Thank you, Brandon. That's what I thought. On a different subject: Not sure I would feel comfortable using the automated exit lanes quite yet. An entry stamp without a corresponging exit stamp screams like problems down the road.
On the con side: Many immigration offices would require the wife to be present with you at every extension. So not only wasting your time with their inefficiencies, but disrespecting your wife’s time, too. Or imagine your marriage going south and the wife not willing to show up with you at immigration - no extension even though still married. Just some random thoughts. If over 50 or other options I would base the stay on those, rather.