Could someone tell me how I can solve all the bugs you have in my skyrim xbox 360 edition, I have the bug of the nightingale blade and I can not make it show up in the grinstone to improvet. If anyone knows how to fix it please comment.

You can't fix it on console. The only way to avoid this bug would be reloading a save from before level 46 and acquiring a lower level version of the blade (only the highest is bugged IIRC).