Mirage vol1 #26 (Veitch's The River part 3) misprint
 

I have had this copy for so long but I just open it up for the first time now and while I was leafing through it I've noticed something strange: some pages are repeated and some are missing.
This is the page order in my book:
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 5, 6, 7, 8, 9, 10, 11, 12, 29, 30, 31, 32, 33, 34, 35, 36, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40.
It looks like 5-12 and 29-36 are printed twice and 13-28 are missing.

Is this misprinting error for #26 known and common?