A family of Microsoft word processing software products for creating web, email, and print documents.
If you are using "Mirror margins," the Inside and Outside margins will be applied correctly. If you are starting numbering at 1 after the TOC, then Word is inserting a blank even page in order to force page 1 to be a recto (odd-numbered, right-hand) page. This is publishing convention. If you want chapters to begin on the left, you can do this, but they will have to be even-numbered pages.
Word's display in Print Layout view can be deceptive because, even if you display two pages, they won't be facing pages, so they will appear to have the gutter on the wrong side. If you view the document in Print Preview (especially if you use Print Preview Edit Mode, which uses the entire screen), you can see true facing pages and also the blank filler page that Word inserts.