The reason behind this is the way that the printer driver sends print commands to the printer. The printer driver sends each label (or row of labels) as a separate print job, so a string of 20 labels would be sent to the printer as 20 separate single label print jobs (or batches).
Because of this, the Autocutter and Perforation cutter will cut between labels even if you set the printer driver to cut at the end of a batch. For instructions on how to make the printer cut only at the end of a job see: PR Plus / i7100 or BBP72 Printers with cutter - How to cut at the end of a job / Printer keeps cutting between labels
- Note - the perforation cutter is only recommended for non-adhesive media such as continuous permasleeves.
