Invalid driver license

A couple weeks ago Rob warned us that new DLs issued in Zihua might not be valid. Using the search he included we discovered that our new DLs from several months ago were no good.
So last week we went back to the DL office for a new set. Lots of people waiting. The machine you tap for an appointment number would not work. A nice lady came up to help us and explained that the office now processes only 30 applications a day. Today’s quota was filled. Further, she explained, that we need to arrive very early to grab a position. She had arrived at 5:00 AM and had still not been called - it was 10:00 AM. Five hour+ wait!!
We drove to La Union and got right in with no wait. Young lady there had us in and out with new licenses in minutes.