Are you using a smithing table? You need to be using that to upgrade diamond tools
Are you using a smithing table? If not, that might be the problem
This is probably the intended behavior, as pushing one or summoning one will not put the end crystal in the exact spot it needs to be to respawn the ender dragon- it'd be hard to code it so that it would respawn the dragon when you summon it in the general area of a block
If you're in a Jungle, this could be Parrots making the noise- parrots make high-pitched, sometimes sped-up sounding mob noises
In addition to this, jukebox noise is currently tied to sounds and not music, meaning that you have to kill your ears if you want a decent jukebox music volume