Why do the things I build on minecraft disappear?

So this has happened a few times now. I will be playing minecraft and go out gathering resources then 10 min later when I go and drop off what I gathered I find the staircase leading down to my storage room gone. I then rebuild it but then it happened again.

This happens when I'm gone so I don't ever see what the cause is. As far as I can tell it wasn't a creeper because my avatar isn't even remotely close to my house. What is happening? I thought that my account might be hacked but as far as I can tell nothing else is missing or messed with. Its just my staircase.

Is this some sort of glitch?

The newest update did leave a glitched area where somethings will be phantom placed. Does it still use up your items after your stuff disappears?

Maybe contact the guys who made Minecraft or post your issue on their forum.

Here you may get some help
http://bestwebpost.weebly.com