Good point, I am just using Salifert and Red Sea kits, not Hanna or more precise tools. I figure I will just keep testing for a few weeks until I can get more data and things are stable where I want them.I don't think our kits are good enough to really show that alk and calcium demand are mismatched as much as you suggest over a few days period, but I don't know which is most off. it also doesn't really matter what one supposes the demand is, jsut how it is tweaked to maintain the levels you want.
That said, the mismatch is too little alk for that calcium demand, not too much.