If you are attempting to print a new label, but your Rollo printer keeps reprinting an old label, it is most likely because Rollo hasn't learned your label's properties.
To update the properties turn Rollo off and turn it back on to clear any pending print jobs.
Make sure you have a label loaded for Rollo to print, followed by several other labels.
Press and hold the top-circular button until you hear one beep, then let go. This starts the automatic label identification. You should see your label moving back and forth and stopping at the correct tear-off point.
When you see a green light, try to print. This should result in the correct printed label.