I'm no expert on printers but it seems unlikely that your printer (when switched off/on) 'remembers' the previous text document settings (labels, font size) and applies these even when issued with new ones for a new print/copy job. I could be wrong.
If in doubt, look for a 'factory reset' option on the printer. Otherwise, print a new couple of lines in Word, setting the document size to A4 and the font size to 12 (or whatever). Text printing shouldn't normally interfere with copying/printing unless you're scanning/copying to a PC and printing from it (as a document or PDF) rather than as an image. In Word, set all print options back to 'normal' (A4), font 12 (or whatever), magnification 100%. When printing, check that all 'print' options such as document/image, magnification, etc. are all 'normal'.
In general, it's Windows (or a specific program) that remembers the previous settings rather than the printer which normally just does what the PC tells it to do.
Hope this helps,
Mike