They know this is wrong.

They know this is wrong. All phyla are not present in the fossil record till the upper Cambrian. Also, you are ignoring the vast time frame of the Pre-Cambrian fossils.[1] [2] It is the genetic studies that push the phyla before the fossil record.[3]

Also, what does it prove to have chordates when you believe that Cambrian chordates swam with whales?

I could also note that the Theory of Evolution does make predictions about the fossil record, but not "the fossil record would start with one type of animal life, increase to two, and so on." Fossilization is a rare event. The theory assumes that the fossil record will always be incomplete. This assumption has been part of the theory for a century in a half. ICR knows this.