After I purchased the game and linked it with my steam account, I tried to refund the money directly on steam. When the refund was successful, the factorio account was not automatically disassociated from the steam account. You still have the right to download and play games. This bug is SERIOUS ...

These are three independent questions.

1:After I purchased the game on steam and tied my factorio account. If I make a refund on steam and succeed (untied), will it be untied automatically?
2:Can two computers log in to an account at the same time?
3: How to use Steam Family Sharing to share games?
thank you very much.