Okay
Firstly, without even bringing cultural differences into it, the comic is arranged in blocks of four panels. You read one block then move on to the next. So it's always going to be 1-3-5-7-2-4-6-8 or the other way round.
Secondly, Japanese and Chinese style writing is traditionally done reading up to down, right to left rather than left to right, up to down. I put those arrows in for a reason.