Touched base with call center half an hour before OLCI open and confirmed:
- oversold Y
- 3 seats available in J but not reward
- I'm only GOLD in Y

For now, I can't check in through App. Says I must check in at airport.
Smells like op-up. My questions are:
1 - Having I checked the auto upgrade option in "manage my booking", will they get my miles or no?
2 - Shall I get to airport as early as possible or can I relax and make it efficiently 1,5 to 1 Hr before boarding?

Thanks again...