Linkalanche

Umm, okay, so I was playing SMBW on the second world. I made it to the first castle and it was this one with all the spikes coming out of the sides. Then I either lost or quit cause I had to go somewhere. The next day I made it there again but it was different, this one where you had to climb the gates. It has been that one every time I play it now. Why was it different the first time I played that specific castle?

I can’t understand where it’s at.