I have a customer who asked me about this sort of a sittuation:

Several products are set on discount for -20%

Then there are some customers set for -10% group discount.

Now when the customers with -10% discount orders the -20% products, they get almost -30% of total discount, which is not OK.

Is there a way to prevent this?

Like altering the ot_group_pricing.php to skip the products that already have specials?

Anyone done this?