By any chance are you on your first character? Or is it your second or third with the same name?

I had Tangoblue #1 die after a while, decided to start over from scratch, deleted him, created Tangoblue #2 (exact same name) and used the seed I had. Eventually, I found a house #1 built with goodies inside then later, I found #1's tombstone with more loot in it. Creeped me out at first then I realized what I had done...essentially I reincarnated (or cloned) myself.

For the record, Tangoblue #2 is happy, successful, rich and lives by the sea.