OK, I think you are assuming that I have done a number of things I have not done. I'll tell you exactly what I have done:
I have created a custom view, added a product list to it, and then I pasted the following code into the view:
from <span style="color:#999;font-size:85%;font-style:italic;">[product.merchant]</span><br />
<strong>Code:</strong> [coupon.code]<br />
<strong>Restrictions:</strong> [coupon.restrictions]<br />
<strong>Begin Date:</strong> [coupon.begin]<br />
<strong>End Date:</strong> [coupon.end]<br />
That is all that I have done. I have made no category for coupons, and I have found no option to filter anything at all in my custom view.