USA airport > Mexico City > Zihua Customs twice?

We haven't had to recheck our bags in MEX for at least two years. The flight from MEX to ZIH is in-country, not international. Just grab your bags and go when you arrive in Z. Eazy-peezy.

BTW, the train in MEX that connects passengers between T1 and T2 (Aerotren) was operating in October but was not operating when we came back through MEX to return to the States last month. Finding the bus to take us from T1 to T2 was a bit of a challenge.