The “coincidences” you refer to are occurring all the time. It is just that people miss them or do not have the knowledge to see them. You are observant enough to see them. Numbers are the “stuff” of the universe. The ancient Greeks were saying that “God geometrizes”, seeing the prevalence of mathematical structure in the cosmos. Numbers allow us to see the structure everywhere.
There are hidden regularities in numbers and sequences of numbers. So the coincidences you mention are another way to state how the second law we describe in YATU, “as above, so below”, works through numbers. And you can find out how they apply to your life.
Keep looking, you are on the right path, you will make many discoveries in your life that will keep amazing you.
love and respect,