Points & Rewards error when buying more than one of the same products

Hi,

I have a problem with at wineshop using woocommerce.

Everything is fine unless you order fx 3 of the same bottles of wine.

Lets say you have a 150 kr bonus, – and you order 3 bottles at 50 kr each, – you would not have to pay anything because of the bonus BUT…
instead of using the whole bonus it only use 1/3, – 50 kr.
If I buy 3 different bottles, theres is no problem, – only if they are the same.

What can be wrong?

Br

Kasper

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