Nebula "conveniently" share neural waves with old nebula, so killing the old version of her makes no difference,they are essentially the same wich is really grim when you think of it, she now has memory of her death...suicide ?
Cap lives in a alternative timeline and return to pass the shield to his original one, problably after his peggy died
the ancient one realized they lost because she didnt share the stone,she only does so because strange does it

how cap returned the jewels to their original state when some of them were in containers before,but just like rocket created a needle sucking of aether that all the great magis in asgard couldnt in TDW,just assume he got a machine that does it

So The Hulk makes the wish that everyone Thanos disappeared five (or is it seven?) years prior are returned in the present - exactly where they were when they were evaporated.

Kind of sucks if one was on an airplane when it happened. Or on a ship at sea. Or someone put up a wall/a tree grew/a chair was placed where you were standing when you evaporated.

"And so, Timmy, you see where I'm standing? This is the exact spot where you mother was when the Vanishing....aaaahhgggg, aaaahhgggg..."

pretty sure he just wished them to return not exactly where they were or we would not get the time jump. but my friend though the same as you and went even darker.
what of the justborn or unborn babies whose mothers commited suicide because they lost them? do their spawn in their corpse ? does the 5 second respawn immunity applies ?