Really sneaky store and terrible staff.
The bulk deals basically use products close to expiry. If you call them out on it, their statement is they are legally allowed to sell you products up to the expiry date. Totally true - but if they've had to come up with the statement as a company policy, it should tell you something.
The issue I really have is that they don't tell you the expiry on most products unless you check yourself. Other's you can figure it out with signage, but for a lot of the stuff, you've just got to check and rummage.
And they're constantly playing around with the stuff, so that they newer products just don't come out till after the christmas sales etc. So for example, if you're buying gift boxes around Christmas time, you're buying stuff with a 2 month expiry as gifts. The day/week after Xmas, you're buying the same discounted stuff with 1 year expiry.
So caveat emptor - buyer beware. I personally have no time to deal with a store with this kind of business ethics.