Maybe your confusing the statistics. For instance a 90% chance to hit doesn't mean that 9 out of 10 swings will hit. It simply means each swing has a 90% chance of hitting. Its neither impossible nor improbable to see 2 or so misses even with a 90% hit probability.
To explain in a little more abstract way. Flipping a coin means you have a 50% chance of getting heads each time.. it doesn't mean that 1 out of every 2 flips you will actually get heads.
Now that's not to say the statistics couldn't be off... simply that missing a few times in a row on occasion doesn't mean that they are.