Controlling order of applied promotion when multiple promos are applicable

Hi,
Is there a way to control which of multiple, applicable promos apply themselves first? What is the logic in the programming?

Example:
Let’s say I have 2 coupon codes that apply to EVERYONE: 10OFF and 20OFF
These promos can be applied to wine x.

Now I run a sale where if you buy 6 of wine x, Ground is 1¢.

In order for this to work, I have two sets of coupled promos:
10OFF is coupled with 1¢ on 6+ of x (A)
20OFF is coupled with 1¢ on 6+ of x (B)

(I don’t want to couple the 1¢ promo with BOTH of the coupon codes, as that would then couple those two for 30% off if someone had both).

How can I get 1¢ on 6+ of x (A) to apply itself, even though these two promos are applicable to “EVERYONE” that uses neither coupon code?

The reason I might want to do that is custom messaging in the promo.
For example:
Everyone gets ground for a penny on x!
Folks with a 20OFF coupon code get ground for a penny on x!
(and for better coupon usage reporting)