At first glance, this proposition, if true, would seem to be an astounding revelation.
But a closer look tells us that it is exactly what should be expected.
The moon, long ago, got to the point whare it always has the same face towards Earth. As time goes on, th Earth can be expected to slow down to do the same. As the Earth slows over eons, the excess angular momentum goes to the moon, whos orbit speeds up ever so slightly, taking it just a bit farther away.
If not for the moon moveing away, and eventually escaping, Earth would slow to the point where a lunar month equals a terrestrial day.
And the slowing effect that the moon has on the Earth is most apparent as a type of drag on the Earth's crust.
It, the moon, slows down as it moves away. See my friend Kepler about this.