20cent
Banned
Every decision you made in the past could potentially create a new timeline. For example, the old Cap at the end movie, he lived his married life in a different universe from the main one. He had to make another jump back to the main universe at the end to give the shield to Sam.”
Yeah but he didn't come back through the device though, he was sitting on a bench implying that he lived his life in the main timeline past and was there the whole time until they started look for him to come back.
I wouldn't think to much about this, there are just making up rules as the movie goes to fit what they want to tell..