OK I just went out to their e coupon site
Harris Teeter - e-VIC Coupons and read this:
With e-VIC coupons, you can now link valuable manufacturer coupons directly to your VIC card. Look for great new offers in your Wednesday e-VIC email and browse the list of e-VIC coupons anytime it's convenient for you (we're adding more coupons all the time!).
This tells me that the evic coupons are "manufacturer coupons," not Harris Teeter store coupons and thus cannot be stacked as their coupon policy you can view here
Harris Teeter - Coupon Policy states:
- We accept only one manufacturer coupon per purchased item.
Allthis makes me think that the ZVR coupons aren't worth it especially if you have a paper manufacturer Q that will double! I hope this helps you feel better, at least that you weren't shorted.

And you helped me understand it better and hopefully some others too.