When I read the op's post I thought he had just gotten confused.

But when we looked at my wife's offer she had also been offered the 80% bonus, but in the drop down box to purchase the points the bonus was 100% !

So I guess it would be easy to assume you bought some, got a 100% bonus and another 80% "mystery bonus" on top.

I'm assuming its another IHG IT error.......but just in case......has anyone bought at 80% this time around and been given +100% with another +80% on top???