DO NOT FILL IN ANY INFORMATION UNTIL YOU ARE AT THE INTERNATIONAL TICKETS DESK!!! Apparently two months timespan means two months minus one day. Eg. 25/06-24/08 NOT 25/06-25/08.
Okay not a huge deal, except in order to change the day it cost €30. Not good when your traveling on a budget. On top of that the lady serving us was very rude about the whole situation and made out seem like it was completely obvious for us to not fill any information in ourselves.
Anyways I hope this helps you have a better experience with Eu rail then I did