I made a concerted effort to take another look at the signs to Terminal A to figure out why they are so confusing.
I figured it out and have outlined the problems right here in the following diagrams to help future sign planners get it right the next time.
THE BAD
As you can see in this diagram, the arrows lead you to believe that the FIRST right hand lane goes to Terminal A and the SECOND lane goes to Terminal B.
WRONG.
The FIRST and SECOND lanes take you to Terminal A. It's the THIRD lane that takes you to Terminal B.
[ Note: If you make a mistake there is an outlet from A to B ]
THE GOOD
This diagram, which I spent some time designing, shows you what my proposed new sign would look like.
Notice that for TERMINAL A is has TWO ARROWS designating that both LANES ONE and TWO take you to TERMINAL A, and that LANE THREE takes you to TERMINAL B.
Thank you for your support.