i created a world on creative then i built a house then i tryed to start a new world on survival and it spawned me in creative mode in the same world with my house

Put the summary of the bug you're having here

What I expected to happen was...:
Describe what you thought should happen here

What actually happened was...:
Describe what happened here

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...
3. ...