I think alters can make other alters
but i think that yours needs more time to figure out if that is what actually happened.

i think that such talk is difficult within the system because it feels similar, and therefor is hard to distinguish between. I have had things like that, too. I though others were created, but it didn't last. Or it was a mental picture (like a safe place/person) to go to, but not functioning independently like the alters - just as a figment... like an imaginary friend. But when trying to look at all that, for me, the lines blur... does that make sense?
kiya