The burrows are few and far between, they are not what you would expect if those strata were laid down over eons. Please do not post your false presumptions as if they were fact. You would do well to learn the different between your fantasies and reality.
The flood lasted a year. The land may have become exposed at various times allowing both fossilized raindrops, tracks and burrows. The scarcity of such burrows still speaks volumes for anyone willing to see.
Again, please stop posting falsehoods. As is too often the case, you have no real knowledge of the actual state of the evidence, and instead of making the effort of learning about it, you just post what you *imagine* it "must" be like. Stop it.
Here's an article recaping opinions from several Creationist PHD's in Geology that answers many of your questions about tracks and burrowings. Below it, I'll quote some key excerpts.
FootprintsInStone
On Burrowings
"Modern marine and terrestrial organisms are 'biological bulldozers' which so thoroughly rework and burrow recent sediments that stratification is often completely homogenized...The intensity of burrowing in sediments on land and under the sea causes us to ask a fundamental question. How could any laminae be preserved in the strata record if sediment accumulates very slowly and is in contact with burrowing organisms for so long? Some evolutionists proposed that the deep-burrowing activity of organisms had not yet evolved when most Grand Canyon strata were deposited. (Thayer, 1979) However, this opinion was strongly challenged by more recent investigators who document deep-burrow structures even in Cambrian strata. (Miller; Sheehan, 1984)." [Austin, p. 31]
On raindrop impressions
"Related to animal tracks that have been thus preserved are the many instances of preservation of ancient ripple marks or raindrop impressions. But that such ephemeral markings could have been preserved in such great numbers and in such perfection is truly a remarkable phenomenon and one for which there is little if any modern parallel. It is a matter of common experience that impressions of this sort in soft mud or sand are very quickly obliterated. It seems clear that the only way in which such prints could be preserved as fossils is by means of some chemical action permitting rapid lithification [rockification] and some aqueous action permitting rapid burial. Some sudden and catastrophic action is again necessary for any reasonable explanation of the phenomena.
On Tracks
However, the Flood didn't overrun the entire earth immediately after the ark door was sealed. We shouldn't expect all land animals and birds to get wiped out by the first encroachments of ocean water on the land. They wouldn't be as vigorous as later inundations. The Flood waters ebbed and flowed, increasing in height day by day until finally the land was submerged. Prior to that time, the deposition of marine layers over land layers would not prevent animals from running, walking, slithering or flying across the topmost layers later on. Indeed, most animals would try to escape the Flood by heading for higher ground, and animals living at higher elevations prior to the Flood would also have been spared. These would later be able to make their tracks in the mud left from earlier wave deposits.