Just to be clear I used the 93' A's because Fatboydad has already picked them.
So we are only using them as an example.
Season 1 you twist Eck to 1990., he will remain 1990 through all 7 seasons unless
you use a 2nd twist to change him to a different season.
You have a maximum of 16 twists to use over the course of 7 seasons.
Answer to your question 1 - Yes! exactly as you stated it.
Question 2
NO! If you find a player was on the roster ( Curt Young) that team and that year BUT,
SIM doesn't qualify him to download,
You can NOT use him.
SIM did not download as part of the team, when you search 93' A's roster, Goose Gossage.
But, he was on the team that season and you are able to download the 716K version.
Gossage IS available for use and a twist.