It would help if you clarified your situation a bit. What was your process with the gold-filled material? And do you mean that there's too much copper in your final AR solution, or in your stockpot?
Göran's question about stannous testing is key--you need to know if there actually is any gold in your AR or not. If that's where you added "too much" copper, then yes, you may have nothing but copper in your solution, and what went to your stockpot is both leftover copper and all your PMs. That's not a problem, per se, because now at least you know where it is, and it won't go anywhere if you leave it alone.
If you were worried about copper in your stockpot, while there are always extremes, it's pretty difficult to have too much copper there--an excess of copper is what cements your PMs out of solution. As long as the stockpot solution is fully saturated with copper (or other, more reactive, metals), there's no room in it for gold, silver, etc. If that's not clear, read up on the reactivity series of metals--it's much of what our acid work, particularly dissolution and waste processing, depends on.