Discount in cart causing error

[KSteele]

Hi Guys, thanks for reading.

Using:

PS 1.6.0.6

Default PS Theme w/ Custom Css

 

I have a Case Discount setup on our store and I see that during checkout the discount works fine.... meaning if I order 12+ products the % is deducted just fine.... however, if I have say... 8 products in the cart during checkout and use the + button to add more product, it works.... but, I get an error each time I click the + button.

 

The error is a popup window the reads: "This address is invalid."

 

Also, at the bottom of the cart the Payment option is missing and instead there is a RED warning that reads: "Error: Please select an address."

 

However, I am signed in to my dummy test account and the address is fine... and even shows during checkout. However, the cart is forcing me to add another address (even though it is the same address) to be able to proceed.

 

Any ideas?

 

See the site here: http://www.dev.nutriguard.com/vitamin-store/

 

best regards, "K"