Bug in minecraft beta 1.17.20.21

I started my world in minecraft beta and I appeared in a mine that I have under my house and clouds appeared and it told me that I was at a height above 100 and I know that that is not the height of where I was and I am still in the world with that problem , I also changed a dragon head that I have for one of a skeleton and my bed is painted red and I am the only one who can enter whenever I want also some banners of the villagers are in complete darkness and my animals or my villagers are not there and the portal of the nether sent me to the Mine under my house and the portal is on the second floor of my house