LPT Zebra UPS Thermal 2844 Printer Printing Slowly

Turn off the printer and place your finger on the green feed button. With the button depressed, turn the printer back on. Let the light flash (ONLY!) four times and release the button. Printer will cycle through 2-3 labels. Press the feed button one more time.
You've just set the printer back to factory default and dumped whatever settings where mucking it up.
If this doesn't fix you, it is an issue between the software you are using (? what kind is it?) and the printer driver.

Use the LP 2742 driver, with some custum settings it should work 3.1mm on hight under paper and rotate the settings.