Why do you insist on using a single fact (that fossils are found world wide) as an independent verification of a Biblical flood without considering the accompanying fossilized ecology that existed at the time of the fossilized organism. Many other fossilized flora and fauna, many diagnostic of the environment are found with the larger fossils. Contained in the same strata as many notable fossils, are fossils of insects, leaves, spores, seeds, pollen, rain drops, and even worm tunnels, each of which requires a specific environment to survive and many a different condition than a flood to be preserved. Some of the sediment contains evidence of dry accumulation, some of wet accumulation; some of stream deposition, some lake deposition, some ocean deposition.
You also ignore the order of strata that quite independently from any dating method shows chronological sequencing of organisms.
Evidence should not be considered independently of all other when determining the history of the rocks.