Joe Sr., yes, this was a stout extract kit and add to that the fact it had some lactose (non-fermentable) sugar in it.
Visually the bottles were perfect. While I did forget to use the bottle brush I did spend a fair amount of time soaking, rinsing, etc. and when I inspected them after the last rinse, they looked "brand new". I even held the bottles up to a light and didn't see anything. If the oxy-clean or anything else was left inside, it was not visible the naked eye.
In that case, I wouldn't be unduly worried. Have a couple over the course of the next couple weeks. If they seem to be overcarbonating, chill them down, call up some friends and enjoy. Cold will both slow down the process of carbonating and get the CO2 into solution, reducing the pressure a bit.
If you're REALLY concerned and they seem to be overcarbonating, you can pop the tops and recap quickly to release some pressure. Not ideal, but it will work and it's better than exploding bottles.