pages spread numbers reversed INDESIGN

I am having the same issue. In my case, I do not have this setting selected on my computer. I put together an entire magazine edition with 1, 2-3, 4-5, etc settings in place. I have a 40 page journal already designed and needing to go to the printers next week, only to discover that the page number order is now reversed from I how made the file (the pages are in the same order, but the setting is now 1, 3-2, 5-4, etc), and I can only guess this happened when I used command functions to move an article in the magazine from one section to another.

That said, it simply buggers belief that a multi-billion dollar company like Adobe wouldn't have thought to put in an option to edit page ordering in the document. Why? I can set margins when I first make the document (where the setting about page order is, as I am well aware of), but I can also, easily, at any point go back to settings and change page margins if I realize I've made a mistake or want a different margin for whatever reason. Why can I not do the same for page ordering? 

I tried doing the script thing and it had absolutely no effect and I quite frankly, have no idea what your explanation actually wants to me to do, or if it assumes everyone already has working knowledge of scripting. I did what the links said to do and nothing happened, and it was really unclear in the first link how I am supposed to make the script, and how I am actually supposed to use it in Indesign. Either way, it seems like a titanic amount of trouble for something that should be a setting as basic as inserting a page number in Microsoft Word, or adding pages in Indesign is, especially seeing as how I made the setting left to right at the start, but for some reason it reverted to the default along the way (I work in Japan and am using a Japanese default setting). 

It would be extremely helpful to have an actual, step by step explanation of how I am supposed to fix this, because using notepad and saving a doc as .jsx with the script you included, then transfering that script to the scripts panel folder and then following the steps in the first link, did absolutely nothing. And again, I'm most confused of all as to why such a basic and simple setting isn't editable by right clicking the file or going into the file's settings.

Hi Uwe,

Thank you for you quick reply. My issue is that I am talking about a document that was designed months ago and when I recently re-opened it, the spreads look correct but the page numbers are reversed on each spread. I cannot 'start with a new document' in order to rebuild this complicated, multi-layered layout. I am trying to figure out how to fix this layout so I can produce a new PDF for the printer.

Thank you,

Mike