As Christopher wrote in his answers to the puzzles, \$$\times \vdash \delta \vdash +\$$ should make sense but I am having trouble with these puzzles still...

I am trying these puzzles and its looks to me that the adjoints for both \$$\times\$$ and + would be the same and not in opposite directions since they are both pairs becoming single entities in objects. What is the difference between the two that is causing the switch?