In the other thread most reefers, included myself, suggested to stay with Reef Cristal, that you were using and allow the Alk to go down naturally. You even measured a fresh batch of RC done by you and you reported be around 9dkh....correct ?
So i do not understand why you changed the salt to Red Sea pro when it is known, very well, for its high alk levels.
Moreover, you wrote you were worried for your SPS. These changes are not good. They need stability. A reefer wrote that there are many successful SPS tanks with high Alk. That is correct, because Stability is a key factor. Keep the tank stable.