When looking through a pinhole the double vision goes away in the upper half. on the bottom half it does go away but its not as clear its slightly bent. like when light bends through water. is this normal for monocular diplopia?

The pinhole corrects the need for eyeglass correction. You have proven that you probably need to see an ophthalmologist who can derive the proper prescription so you can get a pair of eyeglasses and see clearly. A pinhole correction almost always means that better eyeglasses will make you see clearly and that there is little chance of anything else that would be a problem. Have an eye check.

Pinholes correct for refractive errors, but not for retinal issues. Pinholes may also correct for some mild binocular diplopia caused by strabismus. Go see your eye doctor and get refracted for glasses. If they correct your monocular diplopia, then you have your answer.