I love analysis
Checking into the numbers for Match 2 round 1, REO has a breaker counted as one of his knockdowns, but Denzell never broke in that round.
I think in general though, we should talk about what these numbers represent. Imo there isn't much to be gained by comparing knockdowns, because each character's meta is so different. For example, in a typical round Kabal may get several insignificant knockdowns via ground saw or hook toss, whereas Cyrax might land one significant hit and take the entire round.
So a better statistic to compare might be "significant knockdowns" depending on how things play out. But even then, some characters may derive the majoriy of their damage through other things (including chip in MK9 specifically), so it's still hard to just compare one vs. the other in a direct fashion.
I think that by far the most useful statistic in analyzing key matches would be a damage breakdown. So that would entail, tallying each bit of damage received, and what started/led to it. Then you could look at the analysis and see where people statistically got the majority of the damage that won them the rounds. Which starters were most effective? Which did opponents most often get hit by? Were chip damage and incremental damage more deadly, or was it the bigger mistakes? How much did the little gains matter.
Something like that would be highly informative and lead to a better understanding of what it is that is actually opening people up most of the time.