Word puts as many pages side by side as it can fit depending on the zoom you have chosen.
I don't know how you can get two pages on your screen at 100% but only one at 70% - this doesn't make sense to me. Perhaps you should just set your view to 100% zoom and then make the window narrower.

It is true I can make the window smaller which is hardly convinient and means having to resize the window every time I opened word. The situation has got worse now that I find 3 pages crammed onto one page and yet can hardly read the text.

This surely must be a bug? Surely the developers are not intending to force the number of pages we view on a page? As it is I have already had to pay extra for software that will allow me to customise the ribbon bar, am I now expected to look for software so I can see what I am typing ?