Dan Murphy's (Middle Park) - 10% off Single Beers?

I just bought the following beers at Dan Murphy's for $48.60 instead of the listed $53.99 price (link)
- 6x Weihenstephan Hefe Weissbier
- 6x Weihenstephan Kristall Weissbier

On my docket it says "10% off beer sgl", which the counter salesperson said was for single beers, so the discount is probably not specific to this beer.

I didn't inquire that much about the sale so i'm not posting this as a deal.