Automatically inserted pages and page numbering



I created a document, that makes no use of dual side printing or left/right pages. Still, when exporting to PDF or printing, it inserts empty pages. I know how to suppress them, but my question is: is it possible to disable the automatic insertion completely? Main problem is that the ‘total number of pages’ is incorrect if you suppress these pages when printing. I can see the page numbering jump from 1 to 3, changing from one page to the next (different page styles).
I read something about chapter styles, that should always be on an odd numbered page (according to the help page), but I can not find where to change that. Is it hardcoded?

Please help.

I didn’t find the right solution from the Internet.

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