Hi. You have up to january 29 2015 for completing those exam. But dont get panic, you can mix them with the new versions.
Here you may find the info you need:
Your ROUTE exam is valid for three years from the passing date, so you will have until August 2016 to complete your CCNP Routing and Switching certification by passing both SWITCH and TSHOOT by then. As Ramon said, you can mix and match between the exam versions (v1 exams are available until January 29, 2015).