Description:
Writer 5.4.5.1 default page format forces 2 page layout in normal view and doesn't match page width

The page layout rules do not work on new or existing .docx documents. After saving, the page layout portrait 8.5 wide, 11 high does not work on letter size. Document is forced to a left-right 2 page layout. The default page size ( 8.5 wide with margins ) does not work either.

I can't use the product. I can't wait for a fix.
I will attempt to delete the product and install an old working version.
If that doesn't work, I move to Microsoft Office permanently.
Very disappointed on the QA done Writer in this release.

Steps to Reproduce:
1.create new doc with default page layout ( portrait 8.5 x 11 ) - add 3 pages of text - save as .docx format -- exit
2. reopen document - add more text - page down - format changes to 2 page side by side layout
3. format back to normal view - 8.5 margin is lost permanently

Actual Results:  
the document goes to 2 page side by side layout
8.5 wide document margin is lost when formatting to normal view .. document margin is always 11" wide regardless of page formatting sizing and choosing tools > update > page format

Expected Results:
document should always open in default portrait 8.5 wide by 11 tall regardless of doc type when saved ( eg .docx ).


Reproducible: Always


User Profile Reset: No



Additional Info:
Software should have been identical on formatting with older releases.
Big error here.
Not recoverable.
Product not usable.


User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:59.0) Gecko/20100101 Firefox/59.0