from your post...
My system is poly meaning I'm having upwards of 100 alters. I choose to only really say 15 alter because of what I do in my life only about 15 alters get to see time in the body routinely. Can anyone relate in this way?

answer...yes I had introjects as part of my internal system...here in america we do not have a ....diagnosis label.... called poly fragmented like other countries may have so my own treatment providers though I had many alters, too many to count and too many to actually know existed other than sporadic clues. we also did not use the term poly or poly fragmented to describe my internal system. some people call their internal system the secret garden others I know call their system the castle/castled, clan, broken, and yes I have heard some people describe their internal system as fragmented or poly fragmented. for me we referred to my internal system as skeleton keyed. this kind of key has many parts to it and sometimes looks like a broken key with sharp edges, dull edges, ....basically fit how my brain thinks and processes and what having DID reminded me of.

you stated you cant find anyone who describes their system the way you do yours... that may be because not everyone with DID does research so they dont know all the technical terms of days gone by (poly fragmented is very rarely used term now here in the USA since its no longer a diagnostic label and hasnt been for decades here in the USA and the newer diagnostics put in use in 2013 here in america also does not use this term therefore those being newly diagnosed are not going to be using this term either)

my suggestion is dont worry that you cant find anyone who describes their system with the same way you do, instead understand that each persons internal system is comprised differently and the way it is for them. so you call your system poly and you understand why thats the most important part of this..it works for you and your system.

the unstable switching well cant help you there, thats just part of having DID but I can tell you working with my treatment providers I was able to learn tools like grounding, breathing that enabled me to dissociate (your term switch) less often.