Why do we have accomplishments along this journey of enlightenment only to be told some time later that we need to accomplish this same thing again?

While in duality, we have been going around and around the cosmic wheel, encountering the same unsolved issues but at higher and higher levels of clarity.

So one could say that we’ve been spiraling around and around, ever higher?

Yes.

But where does the spiral lead to?

It makes a bigger wheel or loop.

What advantage is there to facing the life experiences of the bigger loop of existence rather than the small loops of the spiral? Isn’t that what enlightenment is: the larger potential, the larger perspective of larger loops as a goal?