alfaberry review for Retail Barcode Labels

I am totally and utterly disappointed by this app. We used it for about a year or so, and it seems to be OK until, it started generating duplicate barcodes. What an utter nightmare. I mean it just needs to do ONE THING. JUST ONE THING - unique barcodes. And it manages to create duplicates. I rang up support, and was told this was "known" If it was know - this is a critical defect!. It shouldn't be that hard to create unique codes. That's what computers are really really good at doing. Please fix this.