… states on the first physical page “page2 of 327 (page0)”
Where do you read that? In the bottom toolbar or in the footer area of your document?
In the bottom toolbar, at left, you may have something like Page 10 2/5, meaning the cursor is presently in a page numbered 10, which is the 2nd physical page out of 5. As you may know, pages may be arbitrarily numbered through manual page breaks before paragraph, forcing a switch to a specific page style and eventually requesting to number pages from there on starting at a chosen number.
In the footer area, these indications are created with field insertion. The numbers may come from any field (variable) and the text is entered by document author. Unless you know the field name is really Page Number and Page Count, you may use anything and confuse the reader ;-).
Orientation of a page is a property of page style. It will not change until LO Writer meets a break (either manual or caused by paragraph style) instructing it to switch to another page style. If you find a mess in your document, the mess is caused by a witless use of page/paragraph styles. The best advice is to review the set of styles. In case there is no methodical usage of paragraph/pages/… styles, i.e. only direct formatting, you’re in the wild and reorganising the document is daunting task.
Finally, blank pages are inserted when there is a break to a page whose page style is constrained to be a left or right page and you are currently on a page of the same parity, hence the blank page to skip the unexpected parity number. Once again, if the blank page is not what you expect, review the document styles, especially the breaks (either manual breaks or paragraph style induced ones).
Typography is a complex and difficult art. If your source matter is not strictly organised, you won’t get a nice look. In particular, if the original author used direct formatting to achieve layout, you’ll never be able to edit the document other than at the cost of checking everything manually; said otherwise, this is equivalent to writing the book again from scratch.
For your comfort and ease of maintenance, learn how to use styles. I know there is an initial investment cost but it really pays back. Start with the user manual. Next, there is the excellent Bruce Byfield’s book Designing with Libre Office, Styles and Templates which can be downloaded from here among other sites.
If you want more personal help, provide more details on the document structure and your configuration (LO version and OS name).