blogleft was a typo of mine and references the sidebar file named: sidebar-left.php so the blogleft was incorrect on my part.
It can get confusing, especially when putting these themes together but Preference also falls under an older method of coding that I did and somethings might not seem overly clear. As I release new themes, I’m constantly improving on how things are done. One of the reasons why I completely rebuilt my Celestial theme from the ground up and released it as Celestial Reloaded.
Anyway, the blogleft being corrected will now show your left widgets in the left side instead of the right sidebar widgets.