Hello,
Printing to sheeting containing multiple labels is quite common in NiceLabel. It looks like you have already specified the proper
rows and
columns within your label design:

- Capture1.JPG (50.15 KiB) Viewed 2110 times
You'll notice that NiceLabel colors the first label area white and the other areas gray. The idea here is that you place your design elements on just that first (white) design area, and then at print time, NiceLabel automatically copies those design objects over to the other label areas on the sheet based upon the quantity requested:

- Capture2.JPG (29.94 KiB) Viewed 2110 times
(in the above example, we placed a "Text" object only on the white portion of the label design and selected a quantity of 4 at print time...NiceLabel automatically populates the additional labels on the sheet).
To have each label of the sheet printed with different/unique data, you could connect a database (ie: MS Access, Excel) to your label design where each record in that database contains unique data to be printing on each label.
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If the text of your printouts is "drifting" on successively printed labels, you may need to re-calibrate your printer for the media that is in it. Consult your printer manual for calibration processes. Hint: when calibration is successful, you should be able to advance the label media in your printer by exactly 1 label each time you press the Feed button on the printer.