If pressing the FEED key advances just one label at a time then the printer works ok by itself. The printer will only do what it's told to do so so if extra labels feed at the end of printing, then you have to look at the printer driver or the label format for something adding the extra labels.
Answers & Comments
These printers are designed to use the labels with the black bar on the back. the bar is the guide that tells it how much to print.
If pressing the FEED key advances just one label at a time then the printer works ok by itself. The printer will only do what it's told to do so so if extra labels feed at the end of printing, then you have to look at the printer driver or the label format for something adding the extra labels.
Hope that helps