On the website, packs containing more than 1 item are considered as more than 1 pack.
e.g. Aldi cod loins cost £4.49 per 260G pack of 2 and advertised as 0.86 per 100G
This is incorrect as the pack, though it contains 2 pieces of fish is still 1 pack, not 2, making it £17.27 per 100G.
I have also seen similar errors with items in other shops.