Good But...

I had every best thing in the game you can name. While I was playing with my little brother I put all of it in my chest to transfer to my new character and I let it save got of the world and got the other character. I got back everything was gone except for the one piece of beetle boots. I was really mad. Later my brother told me that his walls to his little town he built was loosing parts of the wall.

I love this game but it keeps saying its unstable when I get on and now dont play it often because all the valuable items I have are disappearing.
Please fix this!

Botballtepop about Terraria, v1.2.12785