Pavers do not sink because the material was wrong. They sink because the base under them was never built to hold. What you see on the surface — the dip, the lipped edge, the puddle that never drains — is the last step of a problem that started the week the crew skipped a compaction pass.
That is why the low bid is expensive. It is not cheaper work; it is the same work with the invisible half left out. The savings last until the second wet season.
What makes it worse in Orlando: Differential settlement is the pattern here: one area of a driveway drops while the rest stays true. That is a sub-grade problem, and relaying the surface without addressing it just resets the clock.