Soil test

I just sent off some soil test for my new property in Florida and after doing so wonder if I should of sent off a test without mixing the top soil and clay together? Should I send a test of just the top soil and clay separately? I did 1 test just like the probe shows in the photo and I did another test with 2" top soil and 2" of clay. About 9" down it turned to the light brown clay/sand.

Side question, can anyone tell what kind of grass I have?

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