When you go to ticketmaster.nl , o n the right corner next to "account" you can change the language where says ;TAAL , that means language in dutch , then select english. It will work.
About the second show I don't know but I really think will happen, anyway we will find out right at the moment that the general sale starts on Monday 10 AM.
I would recommend to use a stable internet connection, if you have a cable connection to your modern would be the best, wifi could not be fast enough sometimes. Create your account n ticketmaster.nl so have it ready, there are 4 types of GA when you scroll down, don't get confused , GA is GA no matter which one you choose.
Good luck !