I didn't know that they offset this way, but I didn't know that they don't either. It's ALIVE.

what do u mean by offset??? what the heck is it??? It looks like something from "outta" space. LOL

Offset - ' In botany and horticulture, an offset is a small, virtually complete daughter plant that has been naturally and asexually produced on the mother plant. They are clones, meaning that they are genetically identical to the mother plant. '. In other words, a pup. That's what eye mean. Your Pleiospilos looks happy, but I've never grown one.

but it doesn't look like a baby split rock. it resembles an echeverria to me but that's really weird

From WIKI: (including photo):

Vegetative offshoots emerge from the root system.

Maybe it will look similar? Pls. post photo as "it" grows biger...

If it is a different plant than the apparent parent, succulent seeds have a habit of growing in odd places. I agree, it looks like a different plant entirely, but plants often change a lot in appearance from juvenile to mature.