Tools come up wrong in your hand

When you either go to bed or log out with tools in your hot bar, one of the tools when you select it will look like another; such as if a pick and shovel are in your hot bar, the pick when you select it it will come up in your hand as a shovel. But i still mines and doesn't he things it is suposed to do. I actually dont really know how it does this but i assume it happenes when you go to bed or log out, im not sure. Sorry