Possible Bug? Update Cart not functioning

[woodlandsprite]

Vger - thanks for stopping by.
The problem is in the shopping cart itself. I want to only have the update cart below the subtotal on the cart page. (the other option is to have it both next to the product and below the subtotal)

As you noticed, the update cart is not functioning properly on the Shopping cart page. However, if I re-activate the update cart button next to each product in the shopping cart, the update cart button functions as it should.

Unfortunately, I can't figure out how to change the image that is called out for the 2 loacations as I could do a workaround by creating a 1x1 image for use next to the product for updating the cart.

Hopefully that makes sense...

Any ideas?