I think I've found the reason of this problem.
This first page of this cbz file is 197x 280 pixcel, it is portrait size. Rest of the pages are 413x 412 pixcel, they are landscape size. When I open the file, I started to open them from the first page and I look them portrait mode. When I reopen from other pages, kobo touch automatically detects its landscape style and open it in landscape mode. Therefore I have to make all of the comics in portrait size in order to see them in portrait mode.
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