Sorry, I missed some of that before, my fault.
This is a planted tank, and plants need ammonium (which comes from ammonia) to grow. For this reason, I do not believe in using any product that "removes" ammonia. But having said that, most of such products do not remove it, they detoxify it by some means. Some actually do this by converting it into ammonium, which the plants would then use. In acidic water this occurs automatically, ammonia changes into ammonium. But your pH is 7.6 so a product that detoxifies ammonia is fine. However... [read on].
The fact that your fish are ding fine [and I do trust your observations] and the ammnia is reading 2 makes me think that it must be ammonium resulting from the biological product. Most test kits (you have the API if memory serve me correctly) read ammonia and ammonium as one, ammonia. So this may exlain why there are no ill effects. And if this is the case, forget the ammonia pads. The plants and the bacteria will handle this. Keep an eye open for the nitrite, although with healthy plants I would not expect to see much if anything with nitrite.
As for water changes, in a nutshell the more the better in most of our aquaria. In nature fish never remain in the same water for more than a second. Water in rivers, streams, even lakes is constantly moving past them, and their numbers in porportion to the volume of water is so minimal it is always fresh water. In a closed aquarium system we cannot hope to match this. All the filters in the world cannot come close to nature; no filter can remove urine and dissolved (liquified) solid waste, so the fish is always swimming in its own excrement, always. Only the partial water change dilutes this mess and provides fresh water. Filters can remove particulate matter and make the water crystal clear, but they cannot completely "clean" it because they can't remove these toxic substances. Plants and bacteria help, and if the fish load were minimal and the plants heavy, as in the days of old, the pwc would not be so critical. One author I recently read said this would work if we maintained 1 neon tetra to every 4 gallons of water in an aquarium that was heavily planted. So your 10g would hold 2 neons and nothing else, and be thick with plants--and no water change would be necessary.
This is why I and others here recomend a pwc once a week at the minimum, in average to heavily stocked aquaria. Discus keepers normally do a 50% water change every day; and Jack Whattley, an authority on discus, has often written of performing three or four such water changes every day in certain situations.
So, to answer your question, no, more pwc cannot hurt your fish. Just don't disturb the gravel or the filter media to avoid removing the bacteria you are trying to encourage.
To be honest, after going through all this agin with your information, I would leave things as they are. I would not use any more of the supplement. I would observe the fish, as you are, and at any sign of trouble do a pwc. But otherwise, do one every week (not disturbing the gravel or filter as previously mentioned).
I expect others like Twistersmom and AuntKymie are following this thread, so they can jump in if they have spotted something else.
Byron.