Coupon total not working

Hi

Im having issues with the bundle products getting extra discounts from woocommerce coupons.
If the bundled products are normally $132 I take $33 off for a total of $99. So when you add a 10% discount it should be a $9.90 discount.
However the coupons program doesnt calculate it that way when looking at bundled products. It gives 10% off the $132 ($13.20) then it gives another 10% off the discount $33 ($3.30) for a total discount of $16.50 instead of $9.90.

So what you get is a $99 bundled product with $16.50 off for a 10% discount, which is actually a 16.6% discount.
But the coupons do work for single products. This only happens with bundled products.

How do I fix this?