Report from Word doc changing size problem

Yes, I said changing size

I create a report by cutting & pasting a Word doc into the report designer
- I've done dozens of these over time.

The older ones still work fine, but the newer ones (and older ones if I go
into the document edit mode & make any changes) look fine while I'm in the
document edit mode, but change size (visually) when exiting doc-edit mode
back to report design mode.

While in the doc-edit mode, the 'zoom' drop-down shows 100%, but after
editing and exiting edit-mode it changes (to 90% on one PC and to 115% on
another). When you go back into edit mode it will be the new value and I
have found no way so far to prevent the change or to change it back.

Has anyone else ever seen this?

What can be done about it?

Help!

Thanks.