Down in Mexico things are different.
Down in Mexico, people are genuinely interested in who you are. It's also good to know that while extremely hard working, time means much less than it does in the midwest.
What does this mean to you?
Your Mexican colleagues might not show up to the meeting at the same time as you, nor complete that project as you requested - at the same time, alternatives to your expectations might be caused by how you've communicated such timing and information.
Maybe it's you.
Cultural differences run both ways and it's important to understand how to say something as much as what to say.