A couple of people in different areas have posted on mse that the cereal deals in the BOGTF offer are giving you more discount than they should .........
eg. I bought 3 packs of cheerios today at £1.99 B1G2F - but at the till it actually took off £4.43 instead of £3.98 so 3 packs for £1.63 - even better.
Reported as glitch for Cheerios and Sugar Puffs - not sure about others.
thanks to shailesh & CommitedToChange
Also working on Flapjacks - thanks to hotmik - see post 14
online too thanks to bubbles 1969