Yes i would say that is likely the reason for the date. I did not catch that when i was uploading.

Here is my revert change set i completed a few hours ago where i got rid of the town names just so you have it.

changeset/94126317

I went ahead and reverted the change set

changeset/33561867#map=10/16.0239/-90.7693

Here are the terms of use for the Mexican town names data.

http://en.www.inegi.org.mx/inegi/terminos.html