Hi Whirled_Peas,
I also felt that we were talking about the same thing, but I don’t know you, so I went with the rational thinking. 
I only became Seth exclusive myself, including vocabulary, when I began reading The Early Sessions, in 2008, after 13-14 years with the dictation books. Prior to that I was quite eclectic - sticking to one ‘language’, so to speak, has been a relief to me, personally. It is also (sometimes) easier to talk to other Seth readers when you do.
Anyway. On our road to the inner self ‘becoming the immediate self’ - have a fun journey.
(yes, the supraself. Many terms used in The Early Sessions, but few that made it into the dictation books as standard.)