I really like the picture of the double Fox Face, so he likes his reflection. Sorry to hear you are having such a time with your pH. For what it's worth, my pH has never been higher than 8.2 and it probably averages 8.0. I try not to mess with it too much. I think that is where trouble starts, when one tries altering water chemistry. You just rebuilt your tank, give it some time to stabilize. Right now it is most likely favoring acid, but in time will stabilize. Just keep an eye on your inhabitants, if they are happy, eating, corals expanding etc, then I wouldn't worry about the pH too much. If it keeps dropping then you may need to intervene. As long as it is stabile, that's the most important thing, IMHO.
Your LFS is creating a deficit in the Blue Spot market, and if you keep buying them, it gives them more incentive to keep bringing them in!
I am happy that you have such an opportunity. Go get those baby Blue Spots! Maybe May is good time for Blue Spot Awareness Day at RS. At least that is when they are more abundant and more easily obtained. Also, it gives us more time to think about how we are going to present this wonderful fishy. What do you think?