Disappearing blocks

I have a world that have spent a lot of time on, and there is a glitch that won't let me drop a bell or move it to another spot in my inventory. It's just there and I can't do anything about it. There is another glitch that I have suffered from which is putting diamond blocks in a chest and then when I was going to make diamond armor, turning the blocks into 9 diamonds made them crafting recipe normal, the diamonds would go to my inventory and then disappear completely. I lost 3 blocks of diamond be cause of this glitch. Please find a way to fix it.

thank you, Mojang