To use clickable graphics to raise / lower the quantity of a product to add to cart add this parameter to the vsadmin/includes.asp file...
quantityupdown=TRUE
Graphics for the up / down buttons are available in the updater images folder.
Revamped clickable buttons for Quantity boxes (Minimum version 6.7)
To show + / - controls to the right of the quantity box to raise / lower the quantity of a product to add to cart add this parameter to the vsadmin/includes.asp file...
quantityupdown=1
To show + / - controls either side of the quantity box to raise / lower the quantity of a product to add to cart add this parameter to the vsadmin/includes.asp file...
quantityupdown=2
I think maybe you just added the first entry there and didn't notice the others.