[untamed]

There are some things about your question that suggest to me that you should do some reading on Calcium and Alkalinity supplementation methods.

I would recommend that you start at this article and go from there.

http://www.advancedaquarist.com/issues/feb2003/chem.htm

Greatly simplified, you don't want to be adding an Alk supplement alone. Generally speaking you need to add both Ca and Alk in a balanced way. Using your A & B you were on the right track, but you likely added too much which showed itself as a high alkalinity.