A 243 page numbering

[Ork]

Chronologies of Captain Marvel II and Thor include page numbers for A 243. The issue has 22 pages, not 21, making the numbering off by 1.
Iron Man leaves the Avengers in page 16 and the reunion at Avengers Mansion is in pages 18-20.

Captain Marvel II
...
IM 182
A 243 (16:3 - 17)
COH 3 (39)
A 243 (18 - 22)
COH 3 (40 - 44)
...

Thor
...
IM 182-BTS
A 243 (16:3 - 17)
COH 3 (38:3 - 39)
A 243 (18 - 22)
COH 3 (40 - 44)
...