Here a new screen shot. No other program just QIMAGE. Look at text distance from right bottom borders in both.
So, the LHS is the Full Page Editor reduced from full screen size over main screen showing the Page Preview on the RHS. (just so others don't have to work out how your screen is arranged
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Yes, I get the same and have been aware for a long time not to rely on the Page Preview to accurately show position of text. It's what it says on the box, "preview".
The FPE is the place to check text and image position properly, that represents what you get on the print. Use that and no worries
Terry