a traffic dilemma

Assume you are making a left turn from a middle, left-only, lane onto
another multi-lane street.

How soon do you transit to the curb lane after the turn? Right away as part
of the turn? Or as a separate movement from the center lane to the curb?

Now assume not far after the left you will be making another left as
diagrammed by the purple arrows:

http://www.geocities.com/siklelogical/stone.scott.bmp

Do you stay in the center lane? [blue arrows] Or transit to the curb lane
[red arrows] and then back to the center lane for the second left turn?

If it depends on how far the second left is, then how far is that?