The same situation happened in 2010 as Shannon Shorr mentioned. Gus Hansen and Jim Collopy were still in the 10k HU final in London when the WSOPE ME started. They played it out later.
Cantu's issues were many, starting with his semifinal match:
Then he was upset that the "kid" didn't want to finish the match the next day, as Aguiar wanted to play Day 1B of the WSOPE ME. The casino cloes at 5am, which is why the tournament had to go a the day, and Cantu said that allowed Aguiar to gather notes and talk with his "Internet nerd" friends to prepare for the resumption of their match.
Update: Cantu wanted to play Aguiar for the difference between 1st and 2nd (~$130,000 US), and Aguiar BOOKED for sometime during Festa al Lago later this month.