I Found Bugs In My Peanut Butter...

The other day I opened a brand new container of peanut butter, only to find that there were three bugs on the surface of the butter. I took a spoon & touched one of the bugs, only to be shocked at the fact that it started moving. How on earth, does a sealed jar of peanut butter, get bugs in it? On top of that, how does one of them survive? The sealed container had to have been over a week old. Be careful folks, you never know whats in your food.