1. Yes, but it's not foolproof. Much less than 1% chance Chase surprises you with a billing date change. For a Jan 6 statement date you pretty much have to take this chance, because reaching the threshold too close to the statement date often results in a one-month delay in posting the bonus. Something like 5 days before statement drop is a reasonable deadline for posting your transactions to meet the threshold.

2. 1 to 2 days, I think.

3. Should be 1 day.