I just recently picked Minecraft back up again, but I'm now surprised to find out that everything I brought from the Market Place now says I need to buy it again.

Whenever I try to reload an old world, I get this message.

"This world was created using a template that you have not unlocked. You must purchase the template to unlock this world. Would you like to purchase the template used by this world."

I've already brought these things in the past. Why do I need to all of a sudden buy them again?

My account is KINGROKON.