You could use a second add to cart if you have two add to cart buttons.... just make sure your add to cart buttons have a unique name and the triggers are unique.
I think I advised you on setting up the alternate items but never worked on it with you. I'm getting a bit confused at this point as to what you are trying to do and what is and isn't needed. Maybe you do need two add to carts, but then they need to use different button names. Or did you want two items added to the cart with a single button press?
If the correct products are getting added but just have the wrong name then that would imply just an issue with your SQL statement.