This one I can answer.
When Hillary refers to “a whole other system she is referring to the dedicated system for communicating classified materials.
There were two state dept systems....a generic email system that Hillery did not use because she set up her own server (she may have emailed folks on that domain server but did not use an email address rooted on that server.)
The 2nd “whole other system” was a stand aline system which is supposed to be secure and used for talking about classified info/documents.
Nice input——you peeled away Hillary’s layers of lies beautifully.