It is N588HA. 587 was delivered last month, and is already in service. I passed 588 on my way inbound to Seattle from the islands last night. I don't know why the flight tracker showed 12:55 for departure - we passed it just east of Sedar (the Pacific ADIZ boundary), at about 9:30pm PDT, so it probably took off about 9pm from Everett.
One smooth landing is skill. Two in a row is luck. Three in a row and someone is lying.