how to use order subtotal after discount in discount condition

Hi, we’ve been using your discount plugin for a while and really like it.
however, we have recently got some issue with order subtotal. It always return order amount before discount.
It works fine when there is only one discount rule is set.
But if there are two or more discount, subtotal without discount will be substantially higher than subtotal after discount, which will trigger a discount while it shouldn’t

Please let me know if screenshot needed.