Brake bleeding and air

[smq42]

I swapped out my pads and bled my brake fluid today (in preparation for track next wknd).

I noticed a lot of air coming out the left rear and left front but no air from the right rear or right front. Does this make sense--that only one side has air bubbles in it? I would think the left and right sides would have different connections to the master cylinder and maybe the right sided brake line had air in it???