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 Cape Coral: Storm-driven water is the deciding factor. Decks built without a real drainage plan saturate, stay saturated, and push efflorescence to the surface every wet season.