Good vs. Evil Snowman and relocating snow objects

Today I just noticed my Sim had built an evil-looking snowman. It has small horns, fire on its hat, a pitchfork instead of a broom, and a mischievous expression on its face. See the pictures below of the good snowman versus the evil snowman. Is the bad snowman created randomly or under certain conditions? Also I tried relocating one of the snowmen but couldn’t. When you start to move objects, it goes into Buy mode and the snow disappears. I got a message: “Must be placed on snow-covered ground.” Is there a way to move a snowman?

Good SnowmanEvil Snowman