AC993 YYZ-MEX only has 2 people in J today (out of 16 on the 7M8).

I was in 1F and there was another pax in 2F. About 12 hours before the flight, I noticed the seatmap showed 1D, 1F, 2D, and 2F occupied.

Later, I changed my seat to 1A, and the seatmap updated to show 1A and 1C as occupied, while 1D and 1F both opened up.