Well duh
"The ASA upheld complaints against an email advert which said: "Today's deal: £9.80 instead of £24.50 for two people to enjoy fantastic all you can eat Brazilian Rodizio food at ... Save 60%" The regulator ruled the advert failed to make clear that one person had to pay the full price of £24.50 in order for their companion to pay £9.80."
That's not so much misleading as lying. How about:
"£1000 instead of £100000 for fifty brand new Ferraris."
I think you can't blame newbies for this...