Ok…it just registered:) You are referring to Pat 5 in the Scale & Arpeggios book.
No, it is not a composite fingering because it is not “officially” entering 11th position. Remember that unlike other scales in pat. 5, this scale starts with the ring finger on the root on str. 5. Due to its intervallic configuration, in some patterns this scale requires that we shift forward a half step in order to comfortably be able to play the scale. This is called a temporary “extension”. I talk about this on p.16 of the book. Although I mention the principle of shifting “back” a position to reach a note, shifting “forward” falls under the same principle. (I should add that in for the next edition.) Also, if you play the arpeggio only, you will notice that this shift does not occur and yet covers about the full range of the pattern.