I am booked KTA-PER return next week. At T-80 for my first leg it did not give me the option of Row 4...but it opened up 4C for me at T-72.
On my return leg, it is now T-63 and nothing in Row 4 has opened as yet.
On Expert Flyer, it is showing seats in rows 4,5,6 as blocked apart from occupied...