In the training flashback where Obi-Wan and Anakin duel, Anakin has both of his human arms, indicating it must take place before Star Wars: Episode II - Attack of the Clones (2002). Anakin was 19 years old in Attack of the Clones - and 22 years old in Star Wars: Episode III - Revenge of the Sith (2005) - yet in the newly-filmed flashbacks here he is very clearly a 40 year old man.
At one point during the flashback to Anakin and Obi-Wan sparring with their lightsabers, the blue glow of Anakin's lightsaber is reflected on his face but not his neck or clothes.
If Darth Vader could use his force telekinesis to pull back a ship (and additionally pull it apart), he could've used that ability for other needful times throughout the films. (e.g. in 'The Empire Strikes Back' when the Millennium Falcon is taking off on Hoth as he walking to it to capture the heroes).