For options(variations) on Big Commerce, the set up for that product in ecomdash must be arranged a little differently.
When creating the product in ecomdash, enter the "child" SKU in the field for SKU number.
Select the variation check box on the product details page for that product.
A "parent" SKU text box and "child" SKU text box will appear.
Enter the "parent" SKU in the "parent" SKU text box and enter the "child" SKU in the "child" SKU text box.
The "child" SKU will be the same as the SKU for this product.