Margins change between desktop and mobile

You missed the point of my analogy.  The saddle would not adjust itself to the new beast.  And that's the way it is with Word on different platforms.

Going back to an issue in your original post, was there any text in the header that appeared on the Android device, or was there merely an empty paragraph in the header pane?

I gather that by ATS you are referring to Applicant Tracking Systems.  At my age, I need no longer be bothered with such things and they were unheard of in my days of job hunting, which pre-dated computers, or at least the use of them in the business world.

Doug, thank you. So, if I put a saddle intended for an elephant on a horse, the saddle will adjust itself automatically to the new beast? I think a better analogy to describe this situation is that I take a saddle from one horse, put it on another horse of the same size and in the process of moving from one to the other the saddle has changed size. I am a certified Java programmer, an ex-Systems Analyst and also an ex-IT salesman (ATM backbone networks).

And, no, If you send a resume to someone in simple image-style PDF (there are different types of PDF ranging from simple image to fully available text), depending on the version you send the ATS will recognise it or not at all with different parsing results in between - and don't gorget that there are different qualities of ATS on the market ranging from almost pointless to minutely intelligent. I'd much rather just send a doc or docx format and know that they are the best-parsed formats - I even found to my chagrin that the ODT format don't always work well with ATSs, no matter what they say.

Once again, here's another scenario (which I have encountered). I send my resume for a role. Later on I'm talking to someone and it transpires that the same resume would be of interest to them; I whip out my smartphone, open the document and share it by email or whatever method we agree on; the result is that they receive a document which does not look like the one I painstakingly produced. So, to repeat, do you recommend that every singe Word document I produce should be automatically saved in PDF format also, just in case, and even if I do that does it get through the ATS so that a recruiter will even deign to read half of it?

I can tell you the workaround I have adopted for now - never open a document from SkyDrive on my Smartphone to send it - just promise to send it later.

As you can see, the much-touted collaboration which Microsoft markets with Office everywhere (smartphone, tablet, desktop, etc) can not work if the documents are changed surreptitiously when opened depending on the device used.

You can also see that I have a workaround - I made my original post to see whether I was missing something, and in the event that this is a genuine bug then it should be brought to the attention of users and developers alike for their respective priorities. I would have preferred that I had missed something

Word for Android and Word on PC are two completely different animals.  An analogy would be to think of a Word document as a saddle and an Word for Android as a horse and Word on a PC as an Elephant.  While you could place the saddle on either, if it fits one, it is almost certainly not going to fit the other.

An if you are going to be sending documents to people who do not require to edit them, then yes, the best way to ensure that the recipients see the document in the way that you intend is to send it as PDF.

If a recipient is supposed to read a document (but not edit it), then sending it as a PDF makes sense.

Doug, I beg to differ. For a start, I am never certain about how the PDF conversion treats the contents (make an image or overlay  or tags, or the various types of PDF)  - that will cause problems with any ATS. Then there is the question of how does one convert to PDF within Word for Android. Then we also have the problem where I am not a perennial job hunter and actually a professional, so I will have the problem once in a new role. And, of course, it's not supposed to do that: converting to PDF does not stop Word for Android doing something it shouldn't - we go back to Microsoft's marketing thrust - look at the "major changes" promoted by the company for Office 2016.

Do you suggest that I make a PDF of every document I create in Word just in case I have to share it?

Nonetheless, don't et me wrong. I do appreciate you wanting to help me share my document and thank you for it.