Just looked on online ticketing website my season pass for me and my daughter are in reservations but can't buy just comes up not valid
That'll be because they're not on sale yet and they're reserved because they're currently your seat. Expect the letters in the next week or so because they must be priming that section of the website for the proper launch. (A professionally run back room would have added the season ticket section and had it hidden until release date rather than having a half functioning section visible)