Thanks, Linda for taking a look at this!

Salemaker settings:
Deduction 20%
Products Pricerange: 0.00 - 0.00
If a Product is a Special:
Ignore SaleCondition - No Sale Applied When Special Exists

Although I get the same results if I pick either:
Ignore Specials Price - Apply to Product Price and Ignore Special
Apply SaleDeduction to Specials Price - Otherwise apply to Price


Products Price Manager Settings:
Discount Qty Applies to Mixed Attributes Yes (though I'm not using attributes)

Discount Type: Actual Price
Discount Priced from Price

Example:
Model No. 1978
Glass Bell Flower Bead Turquoise Opaque
Product Price Info: Price 0.99
Discount 1 Minimum Qty 12, Discount Value 0.44
Discount 2 Minimum Qty 24, Discount Value 0.29

Vicki