Glad you got it sorted out. :^)
In case anyone else with the same issue happens to find this thread, just make sure you paste at least one complete copy of your standard E-junkie View Cart button code into every page that has any number of Add to Carts for specific products. Our View Cart code loads some javascript into your page that manages the overlay-style cart display "inside" your own page; this code is unique to you but the same for all of your products, so it doesn't matter which product's Get Button Codes screen you obtain it from.