DLS with multi-lane queue to cargo ports

[lokpro]

Hi everybody,
I found DLS does not balance the traffic flow in a multi-lane way in this design, which has only one in-lane and one out-lane.

I found out by trying, my workaround is to build the same n-lane road segment near the exit (2nd picture).
The other end of the extra segment does not require to be connected. I usually connect it back to the road itself to avoid the flashing icon.

examples:

I have read discussions and watched videos, and I only see people using single-lane queuing. Maybe l start the discuss here.

Do you have this kind of design in your cities? How is your design?
Not sure this can be fix in the algorithm?