and honest mistake.

MEGAMART is not stupid to sell expired goods that would cause them to pay a hefty amount in fine/penalty and closure for a certain period of time.

and from what I know from my working for MARSMAN INC (distribution company)way back when: canned food is still considered safe at least 3 months from the date of expiry. MARSMAN sells these items half the price.

I bet you bought it in packets of 4 or 6 SPECIAL SALE...just a guess...