I bought the Warrior rank last night, I plan on donating more in near future, but in the event of me trying to change a pig spawner to a cow spawner, the command feature said I was not able to change spawner types.. But on the website it specifically said that I could change spawner types. Hopefully Im able to change my spawners soon. If not please change the promotions on the Warrior ranking.
If u were doing /spawner (mob) it shouldn't work u have to do /mobspawner (mob) if u did the mobspawner one then it's just Tom forgetting to take away that stuff in donation store