This could have a couple of different causes. Best thing to do is determine if the problem is with the printer or the software. Turn the printer off and back on again. After the power-on self test is done, just press the feed key. Does the printer feed just one label ? If so, then you know the printer has a good calibration on the size of the label. Now print a label. Does it skip one after printing ? If it does, now you know the problem is in the software because the printer is only going to do what it’s told to do. Check all settings in the label software / printer driver to make sure label size is accurate, correct printer driver is being used, etc.

So first check to see if the printer is ok by itself. If it feeds two labels after powering up, then the calibration is needs to be redone. Also make sure the media sensor is positioned over the label. This can cause skipping as well if out of position.

Hope that helps !